27990945

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{241}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 50965200

約数和(自身を除く): 22974255

約数列:

[1, 3, 5, 9, 15, 29, 45, 87, 89, 145, 241, 261, 267, 435, 445, 723, 801, 1205, 1305, 1335, 2169, 2581, 3615, 4005, 6989, 7743, 10845, 12905, 20967, 21449, 23229, 34945, 38715, 62901, 64347, 104835, 107245, 116145, 193041, 314505, 321735, 622021, 965205, 1866063, 3110105, 5598189, 9330315, 27990945]

約数ペア:

[(1, 27990945), (3, 9330315), (5, 5598189), (9, 3110105), (15, 1866063), (29, 965205), (45, 622021), (87, 321735), (89, 314505), (145, 193041), (241, 116145), (261, 107245), (267, 104835), (435, 64347), (445, 62901), (723, 38715), (801, 34945), (1205, 23229), (1305, 21449), (1335, 20967), (2169, 12905), (2581, 10845), (3615, 7743), (4005, 6989)]