128774620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{1229}}^1$

素因数の和:1295

約数の個数: 72

約数和(自身を含む): 302520960

約数和(自身を除く): 173746340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 169, 260, 310, 338, 403, 620, 676, 806, 845, 1229, 1612, 1690, 2015, 2458, 3380, 4030, 4916, 5239, 6145, 8060, 10478, 12290, 15977, 20956, 24580, 26195, 31954, 38099, 52390, 63908, 76198, 79885, 104780, 152396, 159770, 190495, 207701, 319540, 380990, 415402, 495287, 761980, 830804, 990574, 1038505, 1981148, 2077010, 2476435, 4154020, 4952870, 6438731, 9905740, 12877462, 25754924, 32193655, 64387310, 128774620]

約数ペア:

[(1, 128774620), (2, 64387310), (4, 32193655), (5, 25754924), (10, 12877462), (13, 9905740), (20, 6438731), (26, 4952870), (31, 4154020), (52, 2476435), (62, 2077010), (65, 1981148), (124, 1038505), (130, 990574), (155, 830804), (169, 761980), (260, 495287), (310, 415402), (338, 380990), (403, 319540), (620, 207701), (676, 190495), (806, 159770), (845, 152396), (1229, 104780), (1612, 79885), (1690, 76198), (2015, 63908), (2458, 52390), (3380, 38099), (4030, 31954), (4916, 26195), (5239, 24580), (6145, 20956), (8060, 15977), (10478, 12290)]