161888980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:329

約数の個数: 96

約数和(自身を含む): 385418880

約数和(自身を除く): 223529900

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 109, 110, 157, 172, 215, 218, 220, 314, 430, 436, 473, 545, 628, 785, 860, 946, 1090, 1199, 1570, 1727, 1892, 2180, 2365, 2398, 3140, 3454, 4687, 4730, 4796, 5995, 6751, 6908, 8635, 9374, 9460, 11990, 13502, 17113, 17270, 18748, 23435, 23980, 27004, 33755, 34226, 34540, 46870, 51557, 67510, 68452, 74261, 85565, 93740, 103114, 135020, 148522, 171130, 188243, 206228, 257785, 297044, 342260, 371305, 376486, 515570, 735859, 742610, 752972, 941215, 1031140, 1471718, 1485220, 1882430, 2943436, 3679295, 3764860, 7358590, 8094449, 14717180, 16188898, 32377796, 40472245, 80944490, 161888980]

約数ペア:

[(1, 161888980), (2, 80944490), (4, 40472245), (5, 32377796), (10, 16188898), (11, 14717180), (20, 8094449), (22, 7358590), (43, 3764860), (44, 3679295), (55, 2943436), (86, 1882430), (109, 1485220), (110, 1471718), (157, 1031140), (172, 941215), (215, 752972), (218, 742610), (220, 735859), (314, 515570), (430, 376486), (436, 371305), (473, 342260), (545, 297044), (628, 257785), (785, 206228), (860, 188243), (946, 171130), (1090, 148522), (1199, 135020), (1570, 103114), (1727, 93740), (1892, 85565), (2180, 74261), (2365, 68452), (2398, 67510), (3140, 51557), (3454, 46870), (4687, 34540), (4730, 34226), (4796, 33755), (5995, 27004), (6751, 23980), (6908, 23435), (8635, 18748), (9374, 17270), (9460, 17113), (11990, 13502)]