21665187

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:184

約数の個数: 48

約数和(自身を含む): 35077120

約数和(自身を除く): 13411933

約数列:

[1, 3, 9, 19, 31, 57, 61, 67, 93, 171, 183, 201, 279, 549, 589, 603, 1159, 1273, 1767, 1891, 2077, 3477, 3819, 4087, 5301, 5673, 6231, 10431, 11457, 12261, 17019, 18693, 35929, 36783, 39463, 77653, 107787, 118389, 126697, 232959, 323361, 355167, 380091, 698877, 1140273, 2407243, 7221729, 21665187]

約数ペア:

[(1, 21665187), (3, 7221729), (9, 2407243), (19, 1140273), (31, 698877), (57, 380091), (61, 355167), (67, 323361), (93, 232959), (171, 126697), (183, 118389), (201, 107787), (279, 77653), (549, 39463), (589, 36783), (603, 35929), (1159, 18693), (1273, 17019), (1767, 12261), (1891, 11457), (2077, 10431), (3477, 6231), (3819, 5673), (4087, 5301)]