28195420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{191}}^1$

素因数の和:283

約数の個数: 72

約数和(自身を含む): 66495744

約数和(自身を除く): 38300324

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 121, 122, 191, 220, 242, 244, 305, 382, 484, 605, 610, 671, 764, 955, 1210, 1220, 1342, 1910, 2101, 2420, 2684, 3355, 3820, 4202, 6710, 7381, 8404, 10505, 11651, 13420, 14762, 21010, 23111, 23302, 29524, 36905, 42020, 46222, 46604, 58255, 73810, 92444, 115555, 116510, 128161, 147620, 231110, 233020, 256322, 462220, 512644, 640805, 1281610, 1409771, 2563220, 2819542, 5639084, 7048855, 14097710, 28195420]

約数ペア:

[(1, 28195420), (2, 14097710), (4, 7048855), (5, 5639084), (10, 2819542), (11, 2563220), (20, 1409771), (22, 1281610), (44, 640805), (55, 512644), (61, 462220), (110, 256322), (121, 233020), (122, 231110), (191, 147620), (220, 128161), (242, 116510), (244, 115555), (305, 92444), (382, 73810), (484, 58255), (605, 46604), (610, 46222), (671, 42020), (764, 36905), (955, 29524), (1210, 23302), (1220, 23111), (1342, 21010), (1910, 14762), (2101, 13420), (2420, 11651), (2684, 10505), (3355, 8404), (3820, 7381), (4202, 6710)]