21538920

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13807}}^1$

素因数の和:13834

約数の個数: 64

約数和(自身を含む): 69592320

約数和(自身を除く): 48053400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13807, 27614, 41421, 55228, 69035, 82842, 110456, 138070, 165684, 179491, 207105, 276140, 331368, 358982, 414210, 538473, 552280, 717964, 828420, 897455, 1076946, 1435928, 1656840, 1794910, 2153892, 2692365, 3589820, 4307784, 5384730, 7179640, 10769460, 21538920]

約数ペア:

[(1, 21538920), (2, 10769460), (3, 7179640), (4, 5384730), (5, 4307784), (6, 3589820), (8, 2692365), (10, 2153892), (12, 1794910), (13, 1656840), (15, 1435928), (20, 1076946), (24, 897455), (26, 828420), (30, 717964), (39, 552280), (40, 538473), (52, 414210), (60, 358982), (65, 331368), (78, 276140), (104, 207105), (120, 179491), (130, 165684), (156, 138070), (195, 110456), (260, 82842), (312, 69035), (390, 55228), (520, 41421), (780, 27614), (1560, 13807)]