639747992

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{3253}}^1$

素因数の和:3364

約数の個数: 64

約数和(自身を含む): 1355746560

約数和(自身を除く): 715998568

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 61, 62, 104, 122, 124, 244, 248, 403, 488, 793, 806, 1586, 1612, 1891, 3172, 3224, 3253, 3782, 6344, 6506, 7564, 13012, 15128, 24583, 26024, 42289, 49166, 84578, 98332, 100843, 169156, 196664, 198433, 201686, 338312, 396866, 403372, 793732, 806744, 1310959, 1587464, 2579629, 2621918, 5159258, 5243836, 6151423, 10318516, 10487672, 12302846, 20637032, 24605692, 49211384, 79968499, 159936998, 319873996, 639747992]

約数ペア:

[(1, 639747992), (2, 319873996), (4, 159936998), (8, 79968499), (13, 49211384), (26, 24605692), (31, 20637032), (52, 12302846), (61, 10487672), (62, 10318516), (104, 6151423), (122, 5243836), (124, 5159258), (244, 2621918), (248, 2579629), (403, 1587464), (488, 1310959), (793, 806744), (806, 793732), (1586, 403372), (1612, 396866), (1891, 338312), (3172, 201686), (3224, 198433), (3253, 196664), (3782, 169156), (6344, 100843), (6506, 98332), (7564, 84578), (13012, 49166), (15128, 42289), (24583, 26024)]