28815705

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{311}}^1$

素因数の和:422

約数の個数: 48

約数和(自身を含む): 52565760

約数和(自身を除く): 23750055

約数列:

[1, 3, 5, 9, 15, 29, 45, 71, 87, 145, 213, 261, 311, 355, 435, 639, 933, 1065, 1305, 1555, 2059, 2799, 3195, 4665, 6177, 9019, 10295, 13995, 18531, 22081, 27057, 30885, 45095, 66243, 81171, 92655, 110405, 135285, 198729, 331215, 405855, 640349, 993645, 1921047, 3201745, 5763141, 9605235, 28815705]

約数ペア:

[(1, 28815705), (3, 9605235), (5, 5763141), (9, 3201745), (15, 1921047), (29, 993645), (45, 640349), (71, 405855), (87, 331215), (145, 198729), (213, 135285), (261, 110405), (311, 92655), (355, 81171), (435, 66243), (639, 45095), (933, 30885), (1065, 27057), (1305, 22081), (1555, 18531), (2059, 13995), (2799, 10295), (3195, 9019), (4665, 6177)]