28212561

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 46038720

約数和(自身を除く): 17826159

約数列:

[1, 3, 9, 13, 39, 59, 61, 67, 117, 177, 183, 201, 531, 549, 603, 767, 793, 871, 2301, 2379, 2613, 3599, 3953, 4087, 6903, 7137, 7839, 10797, 11859, 12261, 32391, 35577, 36783, 46787, 51389, 53131, 140361, 154167, 159393, 241133, 421083, 462501, 478179, 723399, 2170197, 3134729, 9404187, 28212561]

約数ペア:

[(1, 28212561), (3, 9404187), (9, 3134729), (13, 2170197), (39, 723399), (59, 478179), (61, 462501), (67, 421083), (117, 241133), (177, 159393), (183, 154167), (201, 140361), (531, 53131), (549, 51389), (603, 46787), (767, 36783), (793, 35577), (871, 32391), (2301, 12261), (2379, 11859), (2613, 10797), (3599, 7839), (3953, 7137), (4087, 6903)]