398889980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{557}}^1\times {\mathrm{587}}^1$

素因数の和:1214

約数の個数: 48

約数和(自身を含む): 854382816

約数和(自身を除く): 455492836

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 557, 587, 610, 1114, 1174, 1220, 2228, 2348, 2785, 2935, 5570, 5870, 11140, 11740, 33977, 35807, 67954, 71614, 135908, 143228, 169885, 179035, 326959, 339770, 358070, 653918, 679540, 716140, 1307836, 1634795, 3269590, 6539180, 19944499, 39888998, 79777996, 99722495, 199444990, 398889980]

約数ペア:

[(1, 398889980), (2, 199444990), (4, 99722495), (5, 79777996), (10, 39888998), (20, 19944499), (61, 6539180), (122, 3269590), (244, 1634795), (305, 1307836), (557, 716140), (587, 679540), (610, 653918), (1114, 358070), (1174, 339770), (1220, 326959), (2228, 179035), (2348, 169885), (2785, 143228), (2935, 135908), (5570, 71614), (5870, 67954), (11140, 35807), (11740, 33977)]