18961545

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:162

約数の個数: 64

約数和(自身を含む): 34712064

約数和(自身を除く): 15750519

約数列:

[1, 3, 5, 15, 17, 23, 51, 53, 61, 69, 85, 115, 159, 183, 255, 265, 305, 345, 391, 795, 901, 915, 1037, 1173, 1219, 1403, 1955, 2703, 3111, 3233, 3657, 4209, 4505, 5185, 5865, 6095, 7015, 9699, 13515, 15555, 16165, 18285, 20723, 21045, 23851, 48495, 54961, 62169, 71553, 74359, 103615, 119255, 164883, 223077, 274805, 310845, 357765, 371795, 824415, 1115385, 1264103, 3792309, 6320515, 18961545]

約数ペア:

[(1, 18961545), (3, 6320515), (5, 3792309), (15, 1264103), (17, 1115385), (23, 824415), (51, 371795), (53, 357765), (61, 310845), (69, 274805), (85, 223077), (115, 164883), (159, 119255), (183, 103615), (255, 74359), (265, 71553), (305, 62169), (345, 54961), (391, 48495), (795, 23851), (901, 21045), (915, 20723), (1037, 18285), (1173, 16165), (1219, 15555), (1403, 13515), (1955, 9699), (2703, 7015), (3111, 6095), (3233, 5865), (3657, 5185), (4209, 4505)]