21995220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{173}}^1$

素因数の和:361

約数の個数: 96

約数和(自身を含む): 67116672

約数和(自身を除く): 45121452

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 163, 173, 195, 260, 326, 346, 390, 489, 519, 652, 692, 780, 815, 865, 978, 1038, 1630, 1730, 1956, 2076, 2119, 2249, 2445, 2595, 3260, 3460, 4238, 4498, 4890, 5190, 6357, 6747, 8476, 8996, 9780, 10380, 10595, 11245, 12714, 13494, 21190, 22490, 25428, 26988, 28199, 31785, 33735, 42380, 44980, 56398, 63570, 67470, 84597, 112796, 127140, 134940, 140995, 169194, 281990, 338388, 366587, 422985, 563980, 733174, 845970, 1099761, 1466348, 1691940, 1832935, 2199522, 3665870, 4399044, 5498805, 7331740, 10997610, 21995220]

約数ペア:

[(1, 21995220), (2, 10997610), (3, 7331740), (4, 5498805), (5, 4399044), (6, 3665870), (10, 2199522), (12, 1832935), (13, 1691940), (15, 1466348), (20, 1099761), (26, 845970), (30, 733174), (39, 563980), (52, 422985), (60, 366587), (65, 338388), (78, 281990), (130, 169194), (156, 140995), (163, 134940), (173, 127140), (195, 112796), (260, 84597), (326, 67470), (346, 63570), (390, 56398), (489, 44980), (519, 42380), (652, 33735), (692, 31785), (780, 28199), (815, 26988), (865, 25428), (978, 22490), (1038, 21190), (1630, 13494), (1730, 12714), (1956, 11245), (2076, 10595), (2119, 10380), (2249, 9780), (2445, 8996), (2595, 8476), (3260, 6747), (3460, 6357), (4238, 5190), (4498, 4890)]