397738640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{281}}^1\times {\mathrm{1361}}^1$

素因数の和:1668

約数の個数: 80

約数和(自身を含む): 1000154736

約数和(自身を除く): 602416096

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 281, 520, 562, 1040, 1124, 1361, 1405, 2248, 2722, 2810, 3653, 4496, 5444, 5620, 6805, 7306, 10888, 11240, 13610, 14612, 17693, 18265, 21776, 22480, 27220, 29224, 35386, 36530, 54440, 58448, 70772, 73060, 88465, 108880, 141544, 146120, 176930, 283088, 292240, 353860, 382441, 707720, 764882, 1415440, 1529764, 1912205, 3059528, 3824410, 4971733, 6119056, 7648820, 9943466, 15297640, 19886932, 24858665, 30595280, 39773864, 49717330, 79547728, 99434660, 198869320, 397738640]

約数ペア:

[(1, 397738640), (2, 198869320), (4, 99434660), (5, 79547728), (8, 49717330), (10, 39773864), (13, 30595280), (16, 24858665), (20, 19886932), (26, 15297640), (40, 9943466), (52, 7648820), (65, 6119056), (80, 4971733), (104, 3824410), (130, 3059528), (208, 1912205), (260, 1529764), (281, 1415440), (520, 764882), (562, 707720), (1040, 382441), (1124, 353860), (1361, 292240), (1405, 283088), (2248, 176930), (2722, 146120), (2810, 141544), (3653, 108880), (4496, 88465), (5444, 73060), (5620, 70772), (6805, 58448), (7306, 54440), (10888, 36530), (11240, 35386), (13610, 29224), (14612, 27220), (17693, 22480), (18265, 21776)]