21568240

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15859}}^1$

素因数の和:15889

約数の個数: 40

約数和(自身を含む): 53099280

約数和(自身を除く): 31531040

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15859, 31718, 63436, 79295, 126872, 158590, 253744, 269603, 317180, 539206, 634360, 1078412, 1268720, 1348015, 2156824, 2696030, 4313648, 5392060, 10784120, 21568240]

約数ペア:

[(1, 21568240), (2, 10784120), (4, 5392060), (5, 4313648), (8, 2696030), (10, 2156824), (16, 1348015), (17, 1268720), (20, 1078412), (34, 634360), (40, 539206), (68, 317180), (80, 269603), (85, 253744), (136, 158590), (170, 126872), (272, 79295), (340, 63436), (680, 31718), (1360, 15859)]