28905705

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{173}}^1$

素因数の和:310

約数の個数: 48

約数和(自身を含む): 52116480

約数和(自身を除く): 23210775

約数列:

[1, 3, 5, 9, 15, 45, 47, 79, 141, 173, 235, 237, 395, 423, 519, 705, 711, 865, 1185, 1557, 2115, 2595, 3555, 3713, 7785, 8131, 11139, 13667, 18565, 24393, 33417, 40655, 41001, 55695, 68335, 73179, 121965, 123003, 167085, 205005, 365895, 615015, 642349, 1927047, 3211745, 5781141, 9635235, 28905705]

約数ペア:

[(1, 28905705), (3, 9635235), (5, 5781141), (9, 3211745), (15, 1927047), (45, 642349), (47, 615015), (79, 365895), (141, 205005), (173, 167085), (235, 123003), (237, 121965), (395, 73179), (423, 68335), (519, 55695), (705, 41001), (711, 40655), (865, 33417), (1185, 24393), (1557, 18565), (2115, 13667), (2595, 11139), (3555, 8131), (3713, 7785)]