7801780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{419}}^1$

素因数の和:461

約数の個数: 72

約数和(自身を含む): 20109600

約数和(自身を除く): 12307820

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 70, 76, 95, 98, 133, 140, 190, 196, 245, 266, 380, 419, 490, 532, 665, 838, 931, 980, 1330, 1676, 1862, 2095, 2660, 2933, 3724, 4190, 4655, 5866, 7961, 8380, 9310, 11732, 14665, 15922, 18620, 20531, 29330, 31844, 39805, 41062, 55727, 58660, 79610, 82124, 102655, 111454, 159220, 205310, 222908, 278635, 390089, 410620, 557270, 780178, 1114540, 1560356, 1950445, 3900890, 7801780]

約数ペア:

[(1, 7801780), (2, 3900890), (4, 1950445), (5, 1560356), (7, 1114540), (10, 780178), (14, 557270), (19, 410620), (20, 390089), (28, 278635), (35, 222908), (38, 205310), (49, 159220), (70, 111454), (76, 102655), (95, 82124), (98, 79610), (133, 58660), (140, 55727), (190, 41062), (196, 39805), (245, 31844), (266, 29330), (380, 20531), (419, 18620), (490, 15922), (532, 14665), (665, 11732), (838, 9310), (931, 8380), (980, 7961), (1330, 5866), (1676, 4655), (1862, 4190), (2095, 3724), (2660, 2933)]