19908460

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{6961}}^1$

素因数の和:6994

約数の個数: 48

約数和(自身を含む): 49123872

約数和(自身を除く): 29215412

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 6961, 13922, 27844, 34805, 69610, 76571, 90493, 139220, 153142, 180986, 306284, 361972, 382855, 452465, 765710, 904930, 995423, 1531420, 1809860, 1990846, 3981692, 4977115, 9954230, 19908460]

約数ペア:

[(1, 19908460), (2, 9954230), (4, 4977115), (5, 3981692), (10, 1990846), (11, 1809860), (13, 1531420), (20, 995423), (22, 904930), (26, 765710), (44, 452465), (52, 382855), (55, 361972), (65, 306284), (110, 180986), (130, 153142), (143, 139220), (220, 90493), (260, 76571), (286, 69610), (572, 34805), (715, 27844), (1430, 13922), (2860, 6961)]