21855080

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:151

約数の個数: 96

約数和(自身を含む): 55141560

約数和(自身を除く): 33286480

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 53, 61, 65, 104, 106, 122, 130, 169, 212, 244, 260, 265, 305, 338, 424, 488, 520, 530, 610, 676, 689, 793, 845, 1060, 1220, 1352, 1378, 1586, 1690, 2120, 2440, 2756, 3172, 3233, 3380, 3445, 3965, 5512, 6344, 6466, 6760, 6890, 7930, 8957, 10309, 12932, 13780, 15860, 16165, 17914, 20618, 25864, 27560, 31720, 32330, 35828, 41236, 42029, 44785, 51545, 64660, 71656, 82472, 84058, 89570, 103090, 129320, 168116, 179140, 206180, 210145, 336232, 358280, 412360, 420290, 546377, 840580, 1092754, 1681160, 2185508, 2731885, 4371016, 5463770, 10927540, 21855080]

約数ペア:

[(1, 21855080), (2, 10927540), (4, 5463770), (5, 4371016), (8, 2731885), (10, 2185508), (13, 1681160), (20, 1092754), (26, 840580), (40, 546377), (52, 420290), (53, 412360), (61, 358280), (65, 336232), (104, 210145), (106, 206180), (122, 179140), (130, 168116), (169, 129320), (212, 103090), (244, 89570), (260, 84058), (265, 82472), (305, 71656), (338, 64660), (424, 51545), (488, 44785), (520, 42029), (530, 41236), (610, 35828), (676, 32330), (689, 31720), (793, 27560), (845, 25864), (1060, 20618), (1220, 17914), (1352, 16165), (1378, 15860), (1586, 13780), (1690, 12932), (2120, 10309), (2440, 8957), (2756, 7930), (3172, 6890), (3233, 6760), (3380, 6466), (3445, 6344), (3965, 5512)]