19865320

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12113}}^1$

素因数の和:12165

約数の個数: 32

約数和(自身を含む): 45790920

約数和(自身を除く): 25925600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12113, 24226, 48452, 60565, 96904, 121130, 242260, 484520, 496633, 993266, 1986532, 2483165, 3973064, 4966330, 9932660, 19865320]

約数ペア:

[(1, 19865320), (2, 9932660), (4, 4966330), (5, 3973064), (8, 2483165), (10, 1986532), (20, 993266), (40, 496633), (41, 484520), (82, 242260), (164, 121130), (205, 96904), (328, 60565), (410, 48452), (820, 24226), (1640, 12113)]