20456440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{449}}^1$

素因数の和:544

約数の個数: 64

約数和(自身を含む): 49572000

約数和(自身を除く): 29115560

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 67, 68, 85, 134, 136, 170, 268, 335, 340, 449, 536, 670, 680, 898, 1139, 1340, 1796, 2245, 2278, 2680, 3592, 4490, 4556, 5695, 7633, 8980, 9112, 11390, 15266, 17960, 22780, 30083, 30532, 38165, 45560, 60166, 61064, 76330, 120332, 150415, 152660, 240664, 300830, 305320, 511411, 601660, 1022822, 1203320, 2045644, 2557055, 4091288, 5114110, 10228220, 20456440]

約数ペア:

[(1, 20456440), (2, 10228220), (4, 5114110), (5, 4091288), (8, 2557055), (10, 2045644), (17, 1203320), (20, 1022822), (34, 601660), (40, 511411), (67, 305320), (68, 300830), (85, 240664), (134, 152660), (136, 150415), (170, 120332), (268, 76330), (335, 61064), (340, 60166), (449, 45560), (536, 38165), (670, 30532), (680, 30083), (898, 22780), (1139, 17960), (1340, 15266), (1796, 11390), (2245, 9112), (2278, 8980), (2680, 7633), (3592, 5695), (4490, 4556)]