21200778

素因数分解:

$2^1\times 3^7\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:191

約数の個数: 64

約数和(自身を含む): 49357440

約数和(自身を除く): 28156662

約数列:

[1, 2, 3, 6, 9, 18, 27, 37, 54, 74, 81, 111, 131, 162, 222, 243, 262, 333, 393, 486, 666, 729, 786, 999, 1179, 1458, 1998, 2187, 2358, 2997, 3537, 4374, 4847, 5994, 7074, 8991, 9694, 10611, 14541, 17982, 21222, 26973, 29082, 31833, 43623, 53946, 63666, 80919, 87246, 95499, 130869, 161838, 190998, 261738, 286497, 392607, 572994, 785214, 1177821, 2355642, 3533463, 7066926, 10600389, 21200778]

約数ペア:

[(1, 21200778), (2, 10600389), (3, 7066926), (6, 3533463), (9, 2355642), (18, 1177821), (27, 785214), (37, 572994), (54, 392607), (74, 286497), (81, 261738), (111, 190998), (131, 161838), (162, 130869), (222, 95499), (243, 87246), (262, 80919), (333, 63666), (393, 53946), (486, 43623), (666, 31833), (729, 29082), (786, 26973), (999, 21222), (1179, 17982), (1458, 14541), (1998, 10611), (2187, 9694), (2358, 8991), (2997, 7074), (3537, 5994), (4374, 4847)]