21558040

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{647}}^1$

素因数の和:689

約数の個数: 96

約数和(自身を含む): 59836320

約数和(自身を除く): 38278280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 49, 56, 68, 70, 85, 98, 119, 136, 140, 170, 196, 238, 245, 280, 340, 392, 476, 490, 595, 647, 680, 833, 952, 980, 1190, 1294, 1666, 1960, 2380, 2588, 3235, 3332, 4165, 4529, 4760, 5176, 6470, 6664, 8330, 9058, 10999, 12940, 16660, 18116, 21998, 22645, 25880, 31703, 33320, 36232, 43996, 45290, 54995, 63406, 76993, 87992, 90580, 109990, 126812, 153986, 158515, 181160, 219980, 253624, 307972, 317030, 384965, 439960, 538951, 615944, 634060, 769930, 1077902, 1268120, 1539860, 2155804, 2694755, 3079720, 4311608, 5389510, 10779020, 21558040]

約数ペア:

[(1, 21558040), (2, 10779020), (4, 5389510), (5, 4311608), (7, 3079720), (8, 2694755), (10, 2155804), (14, 1539860), (17, 1268120), (20, 1077902), (28, 769930), (34, 634060), (35, 615944), (40, 538951), (49, 439960), (56, 384965), (68, 317030), (70, 307972), (85, 253624), (98, 219980), (119, 181160), (136, 158515), (140, 153986), (170, 126812), (196, 109990), (238, 90580), (245, 87992), (280, 76993), (340, 63406), (392, 54995), (476, 45290), (490, 43996), (595, 36232), (647, 33320), (680, 31703), (833, 25880), (952, 22645), (980, 21998), (1190, 18116), (1294, 16660), (1666, 12940), (1960, 10999), (2380, 9058), (2588, 8330), (3235, 6664), (3332, 6470), (4165, 5176), (4529, 4760)]