21497970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{277}}^1$

素因数の和:499

約数の個数: 64

約数和(自身を含む): 56044800

約数和(自身を除く): 34546830

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 199, 277, 390, 398, 554, 597, 831, 995, 1194, 1385, 1662, 1990, 2587, 2770, 2985, 3601, 4155, 5174, 5970, 7202, 7761, 8310, 10803, 12935, 15522, 18005, 21606, 25870, 36010, 38805, 54015, 55123, 77610, 108030, 110246, 165369, 275615, 330738, 551230, 716599, 826845, 1433198, 1653690, 2149797, 3582995, 4299594, 7165990, 10748985, 21497970]

約数ペア:

[(1, 21497970), (2, 10748985), (3, 7165990), (5, 4299594), (6, 3582995), (10, 2149797), (13, 1653690), (15, 1433198), (26, 826845), (30, 716599), (39, 551230), (65, 330738), (78, 275615), (130, 165369), (195, 110246), (199, 108030), (277, 77610), (390, 55123), (398, 54015), (554, 38805), (597, 36010), (831, 25870), (995, 21606), (1194, 18005), (1385, 15522), (1662, 12935), (1990, 10803), (2587, 8310), (2770, 7761), (2985, 7202), (3601, 5970), (4155, 5174)]