21098475

素因数分解:

$3^5\times 5^2\times {\mathrm{23}}^1\times {\mathrm{151}}^1$

素因数の和:199

約数の個数: 72

約数和(自身を含む): 41164032

約数和(自身を除く): 20065557

約数列:

[1, 3, 5, 9, 15, 23, 25, 27, 45, 69, 75, 81, 115, 135, 151, 207, 225, 243, 345, 405, 453, 575, 621, 675, 755, 1035, 1215, 1359, 1725, 1863, 2025, 2265, 3105, 3473, 3775, 4077, 5175, 5589, 6075, 6795, 9315, 10419, 11325, 12231, 15525, 17365, 20385, 27945, 31257, 33975, 36693, 46575, 52095, 61155, 86825, 93771, 101925, 139725, 156285, 183465, 260475, 281313, 305775, 468855, 781425, 843939, 917325, 1406565, 2344275, 4219695, 7032825, 21098475]

約数ペア:

[(1, 21098475), (3, 7032825), (5, 4219695), (9, 2344275), (15, 1406565), (23, 917325), (25, 843939), (27, 781425), (45, 468855), (69, 305775), (75, 281313), (81, 260475), (115, 183465), (135, 156285), (151, 139725), (207, 101925), (225, 93771), (243, 86825), (345, 61155), (405, 52095), (453, 46575), (575, 36693), (621, 33975), (675, 31257), (755, 27945), (1035, 20385), (1215, 17365), (1359, 15525), (1725, 12231), (1863, 11325), (2025, 10419), (2265, 9315), (3105, 6795), (3473, 6075), (3775, 5589), (4077, 5175)]