21563480

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1669}}^1$

素因数の和:1716

約数の個数: 64

約数和(自身を含む): 54108000

約数和(自身を除く): 32544520

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 68, 76, 85, 95, 136, 152, 170, 190, 323, 340, 380, 646, 680, 760, 1292, 1615, 1669, 2584, 3230, 3338, 6460, 6676, 8345, 12920, 13352, 16690, 28373, 31711, 33380, 56746, 63422, 66760, 113492, 126844, 141865, 158555, 226984, 253688, 283730, 317110, 539087, 567460, 634220, 1078174, 1134920, 1268440, 2156348, 2695435, 4312696, 5390870, 10781740, 21563480]

約数ペア:

[(1, 21563480), (2, 10781740), (4, 5390870), (5, 4312696), (8, 2695435), (10, 2156348), (17, 1268440), (19, 1134920), (20, 1078174), (34, 634220), (38, 567460), (40, 539087), (68, 317110), (76, 283730), (85, 253688), (95, 226984), (136, 158555), (152, 141865), (170, 126844), (190, 113492), (323, 66760), (340, 63422), (380, 56746), (646, 33380), (680, 31711), (760, 28373), (1292, 16690), (1615, 13352), (1669, 12920), (2584, 8345), (3230, 6676), (3338, 6460)]