209430640

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{2647}}^1$

素因数の和:2726

約数の個数: 80

約数和(自身を含む): 520109568

約数和(自身を除く): 310678928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 43, 46, 80, 86, 92, 115, 172, 184, 215, 230, 344, 368, 430, 460, 688, 860, 920, 989, 1720, 1840, 1978, 2647, 3440, 3956, 4945, 5294, 7912, 9890, 10588, 13235, 15824, 19780, 21176, 26470, 39560, 42352, 52940, 60881, 79120, 105880, 113821, 121762, 211760, 227642, 243524, 304405, 455284, 487048, 569105, 608810, 910568, 974096, 1138210, 1217620, 1821136, 2276420, 2435240, 2617883, 4552840, 4870480, 5235766, 9105680, 10471532, 13089415, 20943064, 26178830, 41886128, 52357660, 104715320, 209430640]

約数ペア:

[(1, 209430640), (2, 104715320), (4, 52357660), (5, 41886128), (8, 26178830), (10, 20943064), (16, 13089415), (20, 10471532), (23, 9105680), (40, 5235766), (43, 4870480), (46, 4552840), (80, 2617883), (86, 2435240), (92, 2276420), (115, 1821136), (172, 1217620), (184, 1138210), (215, 974096), (230, 910568), (344, 608810), (368, 569105), (430, 487048), (460, 455284), (688, 304405), (860, 243524), (920, 227642), (989, 211760), (1720, 121762), (1840, 113821), (1978, 105880), (2647, 79120), (3440, 60881), (3956, 52940), (4945, 42352), (5294, 39560), (7912, 26470), (9890, 21176), (10588, 19780), (13235, 15824)]