19715540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{307}}^1$

素因数の和:361

約数の個数: 72

約数和(自身を含む): 47345760

約数和(自身を除く): 27630220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 169, 190, 247, 260, 307, 338, 380, 494, 614, 676, 845, 988, 1228, 1235, 1535, 1690, 2470, 3070, 3211, 3380, 3991, 4940, 5833, 6140, 6422, 7982, 11666, 12844, 15964, 16055, 19955, 23332, 29165, 32110, 39910, 51883, 58330, 64220, 75829, 79820, 103766, 116660, 151658, 207532, 259415, 303316, 379145, 518830, 758290, 985777, 1037660, 1516580, 1971554, 3943108, 4928885, 9857770, 19715540]

約数ペア:

[(1, 19715540), (2, 9857770), (4, 4928885), (5, 3943108), (10, 1971554), (13, 1516580), (19, 1037660), (20, 985777), (26, 758290), (38, 518830), (52, 379145), (65, 303316), (76, 259415), (95, 207532), (130, 151658), (169, 116660), (190, 103766), (247, 79820), (260, 75829), (307, 64220), (338, 58330), (380, 51883), (494, 39910), (614, 32110), (676, 29165), (845, 23332), (988, 19955), (1228, 16055), (1235, 15964), (1535, 12844), (1690, 11666), (2470, 7982), (3070, 6422), (3211, 6140), (3380, 5833), (3991, 4940)]