1999911680

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3877}}^1$

素因数の和:3942

約数の個数: 144

約数和(自身を含む): 5326696704

約数和(自身を除く): 3326785024

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 64, 65, 80, 104, 124, 128, 130, 155, 160, 208, 248, 256, 260, 310, 320, 403, 416, 496, 520, 620, 640, 806, 832, 992, 1040, 1240, 1280, 1612, 1664, 1984, 2015, 2080, 2480, 3224, 3328, 3877, 3968, 4030, 4160, 4960, 6448, 7754, 7936, 8060, 8320, 9920, 12896, 15508, 16120, 16640, 19385, 19840, 25792, 31016, 32240, 38770, 39680, 50401, 51584, 62032, 64480, 77540, 100802, 103168, 120187, 124064, 128960, 155080, 201604, 240374, 248128, 252005, 257920, 310160, 403208, 480748, 496256, 504010, 515840, 600935, 620320, 806416, 961496, 992512, 1008020, 1201870, 1240640, 1562431, 1612832, 1922992, 2016040, 2403740, 2481280, 3124862, 3225664, 3845984, 4032080, 4807480, 4962560, 6249724, 6451328, 7691968, 7812155, 8064160, 9614960, 12499448, 12902656, 15383936, 15624310, 16128320, 19229920, 24998896, 30767872, 31248620, 32256640, 38459840, 49997792, 62497240, 64513280, 76919680, 99995584, 124994480, 153839360, 199991168, 249988960, 399982336, 499977920, 999955840, 1999911680]

約数ペア:

[(1, 1999911680), (2, 999955840), (4, 499977920), (5, 399982336), (8, 249988960), (10, 199991168), (13, 153839360), (16, 124994480), (20, 99995584), (26, 76919680), (31, 64513280), (32, 62497240), (40, 49997792), (52, 38459840), (62, 32256640), (64, 31248620), (65, 30767872), (80, 24998896), (104, 19229920), (124, 16128320), (128, 15624310), (130, 15383936), (155, 12902656), (160, 12499448), (208, 9614960), (248, 8064160), (256, 7812155), (260, 7691968), (310, 6451328), (320, 6249724), (403, 4962560), (416, 4807480), (496, 4032080), (520, 3845984), (620, 3225664), (640, 3124862), (806, 2481280), (832, 2403740), (992, 2016040), (1040, 1922992), (1240, 1612832), (1280, 1562431), (1612, 1240640), (1664, 1201870), (1984, 1008020), (2015, 992512), (2080, 961496), (2480, 806416), (3224, 620320), (3328, 600935), (3877, 515840), (3968, 504010), (4030, 496256), (4160, 480748), (4960, 403208), (6448, 310160), (7754, 257920), (7936, 252005), (8060, 248128), (8320, 240374), (9920, 201604), (12896, 155080), (15508, 128960), (16120, 124064), (16640, 120187), (19385, 103168), (19840, 100802), (25792, 77540), (31016, 64480), (32240, 62032), (38770, 51584), (39680, 50401)]