21918195

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{181}}^1$

素因数の和:234

約数の個数: 80

約数和(自身を含む): 44396352

約数和(自身を除く): 22478157

約数列:

[1, 3, 5, 9, 13, 15, 23, 27, 39, 45, 65, 69, 81, 115, 117, 135, 181, 195, 207, 299, 345, 351, 405, 543, 585, 621, 897, 905, 1035, 1053, 1495, 1629, 1755, 1863, 2353, 2691, 2715, 3105, 4163, 4485, 4887, 5265, 7059, 8073, 8145, 9315, 11765, 12489, 13455, 14661, 20815, 21177, 24219, 24435, 35295, 37467, 40365, 54119, 62445, 63531, 73305, 105885, 112401, 121095, 162357, 187335, 190593, 270595, 317655, 337203, 487071, 562005, 811785, 952965, 1461213, 1686015, 2435355, 4383639, 7306065, 21918195]

約数ペア:

[(1, 21918195), (3, 7306065), (5, 4383639), (9, 2435355), (13, 1686015), (15, 1461213), (23, 952965), (27, 811785), (39, 562005), (45, 487071), (65, 337203), (69, 317655), (81, 270595), (115, 190593), (117, 187335), (135, 162357), (181, 121095), (195, 112401), (207, 105885), (299, 73305), (345, 63531), (351, 62445), (405, 54119), (543, 40365), (585, 37467), (621, 35295), (897, 24435), (905, 24219), (1035, 21177), (1053, 20815), (1495, 14661), (1629, 13455), (1755, 12489), (1863, 11765), (2353, 9315), (2691, 8145), (2715, 8073), (3105, 7059), (4163, 5265), (4485, 4887)]