21128280

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{10357}}^1$

素因数の和:10388

約数の個数: 64

約数和(自身を含む): 67119840

約数和(自身を除く): 45991560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 51, 60, 68, 85, 102, 120, 136, 170, 204, 255, 340, 408, 510, 680, 1020, 2040, 10357, 20714, 31071, 41428, 51785, 62142, 82856, 103570, 124284, 155355, 176069, 207140, 248568, 310710, 352138, 414280, 528207, 621420, 704276, 880345, 1056414, 1242840, 1408552, 1760690, 2112828, 2641035, 3521380, 4225656, 5282070, 7042760, 10564140, 21128280]

約数ペア:

[(1, 21128280), (2, 10564140), (3, 7042760), (4, 5282070), (5, 4225656), (6, 3521380), (8, 2641035), (10, 2112828), (12, 1760690), (15, 1408552), (17, 1242840), (20, 1056414), (24, 880345), (30, 704276), (34, 621420), (40, 528207), (51, 414280), (60, 352138), (68, 310710), (85, 248568), (102, 207140), (120, 176069), (136, 155355), (170, 124284), (204, 103570), (255, 82856), (340, 62142), (408, 51785), (510, 41428), (680, 31071), (1020, 20714), (2040, 10357)]