21957780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{28151}}^1$

素因数の和:28176

約数の個数: 48

約数和(自身を含む): 66213504

約数和(自身を除く): 44255724

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 28151, 56302, 84453, 112604, 140755, 168906, 281510, 337812, 365963, 422265, 563020, 731926, 844530, 1097889, 1463852, 1689060, 1829815, 2195778, 3659630, 4391556, 5489445, 7319260, 10978890, 21957780]

約数ペア:

[(1, 21957780), (2, 10978890), (3, 7319260), (4, 5489445), (5, 4391556), (6, 3659630), (10, 2195778), (12, 1829815), (13, 1689060), (15, 1463852), (20, 1097889), (26, 844530), (30, 731926), (39, 563020), (52, 422265), (60, 365963), (65, 337812), (78, 281510), (130, 168906), (156, 140755), (195, 112604), (260, 84453), (390, 56302), (780, 28151)]