20007980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{709}}^1$

素因数の和:818

約数の個数: 48

約数和(自身を含む): 45087840

約数和(自身を除く): 25079860

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 83, 85, 166, 170, 332, 340, 415, 709, 830, 1411, 1418, 1660, 2822, 2836, 3545, 5644, 7055, 7090, 12053, 14110, 14180, 24106, 28220, 48212, 58847, 60265, 117694, 120530, 235388, 241060, 294235, 588470, 1000399, 1176940, 2000798, 4001596, 5001995, 10003990, 20007980]

約数ペア:

[(1, 20007980), (2, 10003990), (4, 5001995), (5, 4001596), (10, 2000798), (17, 1176940), (20, 1000399), (34, 588470), (68, 294235), (83, 241060), (85, 235388), (166, 120530), (170, 117694), (332, 60265), (340, 58847), (415, 48212), (709, 28220), (830, 24106), (1411, 14180), (1418, 14110), (1660, 12053), (2822, 7090), (2836, 7055), (3545, 5644)]