640054875

素因数分解:

$3^1\times 5^3\times {\mathrm{73}}^1\times {\mathrm{103}}^1\times {\mathrm{227}}^1$

素因数の和:421

約数の個数: 64

約数和(自身を含む): 1094925312

約数和(自身を除く): 454870437

約数列:

[1, 3, 5, 15, 25, 73, 75, 103, 125, 219, 227, 309, 365, 375, 515, 681, 1095, 1135, 1545, 1825, 2575, 3405, 5475, 5675, 7519, 7725, 9125, 12875, 16571, 17025, 22557, 23381, 27375, 28375, 37595, 38625, 49713, 70143, 82855, 85125, 112785, 116905, 187975, 248565, 350715, 414275, 563925, 584525, 939875, 1242825, 1706813, 1753575, 2071375, 2819625, 2922625, 5120439, 6214125, 8534065, 8767875, 25602195, 42670325, 128010975, 213351625, 640054875]

約数ペア:

[(1, 640054875), (3, 213351625), (5, 128010975), (15, 42670325), (25, 25602195), (73, 8767875), (75, 8534065), (103, 6214125), (125, 5120439), (219, 2922625), (227, 2819625), (309, 2071375), (365, 1753575), (375, 1706813), (515, 1242825), (681, 939875), (1095, 584525), (1135, 563925), (1545, 414275), (1825, 350715), (2575, 248565), (3405, 187975), (5475, 116905), (5675, 112785), (7519, 85125), (7725, 82855), (9125, 70143), (12875, 49713), (16571, 38625), (17025, 37595), (22557, 28375), (23381, 27375)]