20865390

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7643}}^1$

素因数の和:7673

約数の個数: 64

約数和(自身を含む): 61641216

約数和(自身を除く): 40775826

約数列:

[1, 2, 3, 5, 6, 7, 10, 13, 14, 15, 21, 26, 30, 35, 39, 42, 65, 70, 78, 91, 105, 130, 182, 195, 210, 273, 390, 455, 546, 910, 1365, 2730, 7643, 15286, 22929, 38215, 45858, 53501, 76430, 99359, 107002, 114645, 160503, 198718, 229290, 267505, 298077, 321006, 496795, 535010, 596154, 695513, 802515, 993590, 1391026, 1490385, 1605030, 2086539, 2980770, 3477565, 4173078, 6955130, 10432695, 20865390]

約数ペア:

[(1, 20865390), (2, 10432695), (3, 6955130), (5, 4173078), (6, 3477565), (7, 2980770), (10, 2086539), (13, 1605030), (14, 1490385), (15, 1391026), (21, 993590), (26, 802515), (30, 695513), (35, 596154), (39, 535010), (42, 496795), (65, 321006), (70, 298077), (78, 267505), (91, 229290), (105, 198718), (130, 160503), (182, 114645), (195, 107002), (210, 99359), (273, 76430), (390, 53501), (455, 45858), (546, 38215), (910, 22929), (1365, 15286), (2730, 7643)]