21507640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{6983}}^1$

素因数の和:7012

約数の個数: 64

約数和(自身を含む): 60341760

約数和(自身を除く): 38834120

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 140, 154, 220, 280, 308, 385, 440, 616, 770, 1540, 3080, 6983, 13966, 27932, 34915, 48881, 55864, 69830, 76813, 97762, 139660, 153626, 195524, 244405, 279320, 307252, 384065, 391048, 488810, 537691, 614504, 768130, 977620, 1075382, 1536260, 1955240, 2150764, 2688455, 3072520, 4301528, 5376910, 10753820, 21507640]

約数ペア:

[(1, 21507640), (2, 10753820), (4, 5376910), (5, 4301528), (7, 3072520), (8, 2688455), (10, 2150764), (11, 1955240), (14, 1536260), (20, 1075382), (22, 977620), (28, 768130), (35, 614504), (40, 537691), (44, 488810), (55, 391048), (56, 384065), (70, 307252), (77, 279320), (88, 244405), (110, 195524), (140, 153626), (154, 139660), (220, 97762), (280, 76813), (308, 69830), (385, 55864), (440, 48881), (616, 34915), (770, 27932), (1540, 13966), (3080, 6983)]