20016080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1153}}^1$

素因数の和:1204

約数の個数: 80

約数和(自身を含む): 54948864

約数和(自身を除く): 34932784

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 217, 248, 280, 310, 434, 496, 560, 620, 868, 1085, 1153, 1240, 1736, 2170, 2306, 2480, 3472, 4340, 4612, 5765, 8071, 8680, 9224, 11530, 16142, 17360, 18448, 23060, 32284, 35743, 40355, 46120, 64568, 71486, 80710, 92240, 129136, 142972, 161420, 178715, 250201, 285944, 322840, 357430, 500402, 571888, 645680, 714860, 1000804, 1251005, 1429720, 2001608, 2502010, 2859440, 4003216, 5004020, 10008040, 20016080]

約数ペア:

[(1, 20016080), (2, 10008040), (4, 5004020), (5, 4003216), (7, 2859440), (8, 2502010), (10, 2001608), (14, 1429720), (16, 1251005), (20, 1000804), (28, 714860), (31, 645680), (35, 571888), (40, 500402), (56, 357430), (62, 322840), (70, 285944), (80, 250201), (112, 178715), (124, 161420), (140, 142972), (155, 129136), (217, 92240), (248, 80710), (280, 71486), (310, 64568), (434, 46120), (496, 40355), (560, 35743), (620, 32284), (868, 23060), (1085, 18448), (1153, 17360), (1240, 16142), (1736, 11530), (2170, 9224), (2306, 8680), (2480, 8071), (3472, 5765), (4340, 4612)]