1981205120

素因数分解:

$2^7\times 5^1\times {\mathrm{271}}^1\times {\mathrm{11423}}^1$

素因数の和:11713

約数の個数: 64

約数和(自身を含む): 4754211840

約数和(自身を除く): 2773006720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 271, 320, 542, 640, 1084, 1355, 2168, 2710, 4336, 5420, 8672, 10840, 11423, 17344, 21680, 22846, 34688, 43360, 45692, 57115, 86720, 91384, 114230, 173440, 182768, 228460, 365536, 456920, 731072, 913840, 1462144, 1827680, 3095633, 3655360, 6191266, 7310720, 12382532, 15478165, 24765064, 30956330, 49530128, 61912660, 99060256, 123825320, 198120512, 247650640, 396241024, 495301280, 990602560, 1981205120]

約数ペア:

[(1, 1981205120), (2, 990602560), (4, 495301280), (5, 396241024), (8, 247650640), (10, 198120512), (16, 123825320), (20, 99060256), (32, 61912660), (40, 49530128), (64, 30956330), (80, 24765064), (128, 15478165), (160, 12382532), (271, 7310720), (320, 6191266), (542, 3655360), (640, 3095633), (1084, 1827680), (1355, 1462144), (2168, 913840), (2710, 731072), (4336, 456920), (5420, 365536), (8672, 228460), (10840, 182768), (11423, 173440), (17344, 114230), (21680, 91384), (22846, 86720), (34688, 57115), (43360, 45692)]