2156980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:125

約数の個数: 72

約数和(自身を含む): 5515776

約数和(自身を除く): 3358796

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 49, 62, 70, 71, 98, 124, 140, 142, 155, 196, 217, 245, 284, 310, 355, 434, 490, 497, 620, 710, 868, 980, 994, 1085, 1420, 1519, 1988, 2170, 2201, 2485, 3038, 3479, 4340, 4402, 4970, 6076, 6958, 7595, 8804, 9940, 11005, 13916, 15190, 15407, 17395, 22010, 30380, 30814, 34790, 44020, 61628, 69580, 77035, 107849, 154070, 215698, 308140, 431396, 539245, 1078490, 2156980]

約数ペア:

[(1, 2156980), (2, 1078490), (4, 539245), (5, 431396), (7, 308140), (10, 215698), (14, 154070), (20, 107849), (28, 77035), (31, 69580), (35, 61628), (49, 44020), (62, 34790), (70, 30814), (71, 30380), (98, 22010), (124, 17395), (140, 15407), (142, 15190), (155, 13916), (196, 11005), (217, 9940), (245, 8804), (284, 7595), (310, 6958), (355, 6076), (434, 4970), (490, 4402), (497, 4340), (620, 3479), (710, 3038), (868, 2485), (980, 2201), (994, 2170), (1085, 1988), (1420, 1519)]