20303240

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 47608560

約数和(自身を除く): 27305320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 61, 106, 122, 157, 212, 244, 265, 305, 314, 424, 488, 530, 610, 628, 785, 1060, 1220, 1256, 1570, 2120, 2440, 3140, 3233, 6280, 6466, 8321, 9577, 12932, 16165, 16642, 19154, 25864, 32330, 33284, 38308, 41605, 47885, 64660, 66568, 76616, 83210, 95770, 129320, 166420, 191540, 332840, 383080, 507581, 1015162, 2030324, 2537905, 4060648, 5075810, 10151620, 20303240]

約数ペア:

[(1, 20303240), (2, 10151620), (4, 5075810), (5, 4060648), (8, 2537905), (10, 2030324), (20, 1015162), (40, 507581), (53, 383080), (61, 332840), (106, 191540), (122, 166420), (157, 129320), (212, 95770), (244, 83210), (265, 76616), (305, 66568), (314, 64660), (424, 47885), (488, 41605), (530, 38308), (610, 33284), (628, 32330), (785, 25864), (1060, 19154), (1220, 16642), (1256, 16165), (1570, 12932), (2120, 9577), (2440, 8321), (3140, 6466), (3233, 6280)]