21489975

素因数分解:

$3^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:142

約数の個数: 96

約数和(自身を含む): 44441600

約数和(自身を除く): 22951625

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 31, 39, 45, 65, 75, 79, 93, 117, 135, 155, 195, 225, 237, 279, 325, 351, 395, 403, 465, 585, 675, 711, 775, 837, 975, 1027, 1185, 1209, 1395, 1755, 1975, 2015, 2133, 2325, 2449, 2925, 3081, 3555, 3627, 4185, 5135, 5925, 6045, 6975, 7347, 8775, 9243, 10075, 10665, 10881, 12245, 15405, 17775, 18135, 20925, 22041, 25675, 27729, 30225, 31837, 36735, 46215, 53325, 54405, 61225, 66123, 77025, 90675, 95511, 110205, 138645, 159185, 183675, 231075, 272025, 286533, 330615, 477555, 551025, 693225, 795925, 859599, 1432665, 1653075, 2387775, 4297995, 7163325, 21489975]

約数ペア:

[(1, 21489975), (3, 7163325), (5, 4297995), (9, 2387775), (13, 1653075), (15, 1432665), (25, 859599), (27, 795925), (31, 693225), (39, 551025), (45, 477555), (65, 330615), (75, 286533), (79, 272025), (93, 231075), (117, 183675), (135, 159185), (155, 138645), (195, 110205), (225, 95511), (237, 90675), (279, 77025), (325, 66123), (351, 61225), (395, 54405), (403, 53325), (465, 46215), (585, 36735), (675, 31837), (711, 30225), (775, 27729), (837, 25675), (975, 22041), (1027, 20925), (1185, 18135), (1209, 17775), (1395, 15405), (1755, 12245), (1975, 10881), (2015, 10665), (2133, 10075), (2325, 9243), (2449, 8775), (2925, 7347), (3081, 6975), (3555, 6045), (3627, 5925), (4185, 5135)]