263438720

素因数分解:

$2^7\times 5^1\times {\mathrm{557}}^1\times {\mathrm{739}}^1$

素因数の和:1315

約数の個数: 64

約数和(自身を含む): 631767600

約数和(自身を除く): 368328880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 557, 640, 739, 1114, 1478, 2228, 2785, 2956, 3695, 4456, 5570, 5912, 7390, 8912, 11140, 11824, 14780, 17824, 22280, 23648, 29560, 35648, 44560, 47296, 59120, 71296, 89120, 94592, 118240, 178240, 236480, 356480, 411623, 472960, 823246, 1646492, 2058115, 3292984, 4116230, 6585968, 8232460, 13171936, 16464920, 26343872, 32929840, 52687744, 65859680, 131719360, 263438720]

約数ペア:

[(1, 263438720), (2, 131719360), (4, 65859680), (5, 52687744), (8, 32929840), (10, 26343872), (16, 16464920), (20, 13171936), (32, 8232460), (40, 6585968), (64, 4116230), (80, 3292984), (128, 2058115), (160, 1646492), (320, 823246), (557, 472960), (640, 411623), (739, 356480), (1114, 236480), (1478, 178240), (2228, 118240), (2785, 94592), (2956, 89120), (3695, 71296), (4456, 59120), (5570, 47296), (5912, 44560), (7390, 35648), (8912, 29560), (11140, 23648), (11824, 22280), (14780, 17824)]