21900080

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{16103}}^1$

素因数の和:16133

約数の個数: 40

約数和(自身を含む): 53916192

約数和(自身を除く): 32016112

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 16103, 32206, 64412, 80515, 128824, 161030, 257648, 273751, 322060, 547502, 644120, 1095004, 1288240, 1368755, 2190008, 2737510, 4380016, 5475020, 10950040, 21900080]

約数ペア:

[(1, 21900080), (2, 10950040), (4, 5475020), (5, 4380016), (8, 2737510), (10, 2190008), (16, 1368755), (17, 1288240), (20, 1095004), (34, 644120), (40, 547502), (68, 322060), (80, 273751), (85, 257648), (136, 161030), (170, 128824), (272, 80515), (340, 64412), (680, 32206), (1360, 16103)]