20163560

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{617}}^1$

素因数の和:690

約数の個数: 64

約数和(自身を含む): 48945600

約数和(自身を除く): 28782040

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 43, 76, 86, 95, 152, 172, 190, 215, 344, 380, 430, 617, 760, 817, 860, 1234, 1634, 1720, 2468, 3085, 3268, 4085, 4936, 6170, 6536, 8170, 11723, 12340, 16340, 23446, 24680, 26531, 32680, 46892, 53062, 58615, 93784, 106124, 117230, 132655, 212248, 234460, 265310, 468920, 504089, 530620, 1008178, 1061240, 2016356, 2520445, 4032712, 5040890, 10081780, 20163560]

約数ペア:

[(1, 20163560), (2, 10081780), (4, 5040890), (5, 4032712), (8, 2520445), (10, 2016356), (19, 1061240), (20, 1008178), (38, 530620), (40, 504089), (43, 468920), (76, 265310), (86, 234460), (95, 212248), (152, 132655), (172, 117230), (190, 106124), (215, 93784), (344, 58615), (380, 53062), (430, 46892), (617, 32680), (760, 26531), (817, 24680), (860, 23446), (1234, 16340), (1634, 12340), (1720, 11723), (2468, 8170), (3085, 6536), (3268, 6170), (4085, 4936)]