20697460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1$

素因数の和:317

約数の個数: 96

約数和(自身を含む): 54190080

約数和(自身を除く): 33492620

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 31, 35, 38, 62, 70, 76, 95, 124, 133, 140, 155, 190, 217, 251, 266, 310, 380, 434, 502, 532, 589, 620, 665, 868, 1004, 1085, 1178, 1255, 1330, 1757, 2170, 2356, 2510, 2660, 2945, 3514, 4123, 4340, 4769, 5020, 5890, 7028, 7781, 8246, 8785, 9538, 11780, 15562, 16492, 17570, 19076, 20615, 23845, 31124, 33383, 35140, 38905, 41230, 47690, 54467, 66766, 77810, 82460, 95380, 108934, 133532, 147839, 155620, 166915, 217868, 272335, 295678, 333830, 544670, 591356, 667660, 739195, 1034873, 1089340, 1478390, 2069746, 2956780, 4139492, 5174365, 10348730, 20697460]

約数ペア:

[(1, 20697460), (2, 10348730), (4, 5174365), (5, 4139492), (7, 2956780), (10, 2069746), (14, 1478390), (19, 1089340), (20, 1034873), (28, 739195), (31, 667660), (35, 591356), (38, 544670), (62, 333830), (70, 295678), (76, 272335), (95, 217868), (124, 166915), (133, 155620), (140, 147839), (155, 133532), (190, 108934), (217, 95380), (251, 82460), (266, 77810), (310, 66766), (380, 54467), (434, 47690), (502, 41230), (532, 38905), (589, 35140), (620, 33383), (665, 31124), (868, 23845), (1004, 20615), (1085, 19076), (1178, 17570), (1255, 16492), (1330, 15562), (1757, 11780), (2170, 9538), (2356, 8785), (2510, 8246), (2660, 7781), (2945, 7028), (3514, 5890), (4123, 5020), (4340, 4769)]