21840867

素因数分解:

$3^3\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:308

約数の個数: 32

約数和(自身を含む): 33480000

約数和(自身を除く): 11639133

約数列:

[1, 3, 9, 27, 61, 89, 149, 183, 267, 447, 549, 801, 1341, 1647, 2403, 4023, 5429, 9089, 13261, 16287, 27267, 39783, 48861, 81801, 119349, 146583, 245403, 358047, 808921, 2426763, 7280289, 21840867]

約数ペア:

[(1, 21840867), (3, 7280289), (9, 2426763), (27, 808921), (61, 358047), (89, 245403), (149, 146583), (183, 119349), (267, 81801), (447, 48861), (549, 39783), (801, 27267), (1341, 16287), (1647, 13261), (2403, 9089), (4023, 5429)]