21104560

素因数分解:

$2^4\times 5^1\times {\mathrm{331}}^1\times {\mathrm{797}}^1$

素因数の和:1141

約数の個数: 40

約数和(自身を含む): 49278096

約数和(自身を除く): 28173536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 331, 662, 797, 1324, 1594, 1655, 2648, 3188, 3310, 3985, 5296, 6376, 6620, 7970, 12752, 13240, 15940, 26480, 31880, 63760, 263807, 527614, 1055228, 1319035, 2110456, 2638070, 4220912, 5276140, 10552280, 21104560]

約数ペア:

[(1, 21104560), (2, 10552280), (4, 5276140), (5, 4220912), (8, 2638070), (10, 2110456), (16, 1319035), (20, 1055228), (40, 527614), (80, 263807), (331, 63760), (662, 31880), (797, 26480), (1324, 15940), (1594, 13240), (1655, 12752), (2648, 7970), (3188, 6620), (3310, 6376), (3985, 5296)]