79280020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{1801}}^1$

素因数の和:1912

約数の個数: 48

約数和(自身を含む): 174375936

約数和(自身を除く): 95095916

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 71, 124, 142, 155, 284, 310, 355, 620, 710, 1420, 1801, 2201, 3602, 4402, 7204, 8804, 9005, 11005, 18010, 22010, 36020, 44020, 55831, 111662, 127871, 223324, 255742, 279155, 511484, 558310, 639355, 1116620, 1278710, 2557420, 3964001, 7928002, 15856004, 19820005, 39640010, 79280020]

約数ペア:

[(1, 79280020), (2, 39640010), (4, 19820005), (5, 15856004), (10, 7928002), (20, 3964001), (31, 2557420), (62, 1278710), (71, 1116620), (124, 639355), (142, 558310), (155, 511484), (284, 279155), (310, 255742), (355, 223324), (620, 127871), (710, 111662), (1420, 55831), (1801, 44020), (2201, 36020), (3602, 22010), (4402, 18010), (7204, 11005), (8804, 9005)]