19643920

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{113}}^1$

素因数の和:220

約数の個数: 80

約数和(自身を含む): 48090672

約数和(自身を除く): 28446752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 53, 80, 82, 106, 113, 164, 205, 212, 226, 265, 328, 410, 424, 452, 530, 565, 656, 820, 848, 904, 1060, 1130, 1640, 1808, 2120, 2173, 2260, 3280, 4240, 4346, 4520, 4633, 5989, 8692, 9040, 9266, 10865, 11978, 17384, 18532, 21730, 23165, 23956, 29945, 34768, 37064, 43460, 46330, 47912, 59890, 74128, 86920, 92660, 95824, 119780, 173840, 185320, 239560, 245549, 370640, 479120, 491098, 982196, 1227745, 1964392, 2455490, 3928784, 4910980, 9821960, 19643920]

約数ペア:

[(1, 19643920), (2, 9821960), (4, 4910980), (5, 3928784), (8, 2455490), (10, 1964392), (16, 1227745), (20, 982196), (40, 491098), (41, 479120), (53, 370640), (80, 245549), (82, 239560), (106, 185320), (113, 173840), (164, 119780), (205, 95824), (212, 92660), (226, 86920), (265, 74128), (328, 59890), (410, 47912), (424, 46330), (452, 43460), (530, 37064), (565, 34768), (656, 29945), (820, 23956), (848, 23165), (904, 21730), (1060, 18532), (1130, 17384), (1640, 11978), (1808, 10865), (2120, 9266), (2173, 9040), (2260, 8692), (3280, 5989), (4240, 4633), (4346, 4520)]