28259775

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:177

約数の個数: 72

約数和(自身を含む): 53969760

約数和(自身を除く): 25709985

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 61, 71, 75, 87, 145, 183, 213, 225, 261, 305, 355, 435, 549, 639, 725, 915, 1065, 1305, 1525, 1769, 1775, 2059, 2175, 2745, 3195, 4331, 4575, 5307, 5325, 6177, 6525, 8845, 10295, 12993, 13725, 15921, 15975, 18531, 21655, 26535, 30885, 38979, 44225, 51475, 64965, 79605, 92655, 108275, 125599, 132675, 154425, 194895, 324825, 376797, 398025, 463275, 627995, 974475, 1130391, 1883985, 3139975, 5651955, 9419925, 28259775]

約数ペア:

[(1, 28259775), (3, 9419925), (5, 5651955), (9, 3139975), (15, 1883985), (25, 1130391), (29, 974475), (45, 627995), (61, 463275), (71, 398025), (75, 376797), (87, 324825), (145, 194895), (183, 154425), (213, 132675), (225, 125599), (261, 108275), (305, 92655), (355, 79605), (435, 64965), (549, 51475), (639, 44225), (725, 38979), (915, 30885), (1065, 26535), (1305, 21655), (1525, 18531), (1769, 15975), (1775, 15921), (2059, 13725), (2175, 12993), (2745, 10295), (3195, 8845), (4331, 6525), (4575, 6177), (5307, 5325)]