816140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:138

約数の個数: 48

約数和(自身を含む): 1914528

約数和(自身を除く): 1098388

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 43, 52, 65, 73, 86, 130, 146, 172, 215, 260, 292, 365, 430, 559, 730, 860, 949, 1118, 1460, 1898, 2236, 2795, 3139, 3796, 4745, 5590, 6278, 9490, 11180, 12556, 15695, 18980, 31390, 40807, 62780, 81614, 163228, 204035, 408070, 816140]

約数ペア:

[(1, 816140), (2, 408070), (4, 204035), (5, 163228), (10, 81614), (13, 62780), (20, 40807), (26, 31390), (43, 18980), (52, 15695), (65, 12556), (73, 11180), (86, 9490), (130, 6278), (146, 5590), (172, 4745), (215, 3796), (260, 3139), (292, 2795), (365, 2236), (430, 1898), (559, 1460), (730, 1118), (860, 949)]