20478780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16253}}^1$

素因数の和:16275

約数の個数: 72

約数和(自身を含む): 70997472

約数和(自身を除く): 50518692

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16253, 32506, 48759, 65012, 81265, 97518, 113771, 146277, 162530, 195036, 227542, 243795, 292554, 325060, 341313, 455084, 487590, 568855, 585108, 682626, 731385, 975180, 1023939, 1137710, 1365252, 1462770, 1706565, 2047878, 2275420, 2925540, 3413130, 4095756, 5119695, 6826260, 10239390, 20478780]

約数ペア:

[(1, 20478780), (2, 10239390), (3, 6826260), (4, 5119695), (5, 4095756), (6, 3413130), (7, 2925540), (9, 2275420), (10, 2047878), (12, 1706565), (14, 1462770), (15, 1365252), (18, 1137710), (20, 1023939), (21, 975180), (28, 731385), (30, 682626), (35, 585108), (36, 568855), (42, 487590), (45, 455084), (60, 341313), (63, 325060), (70, 292554), (84, 243795), (90, 227542), (105, 195036), (126, 162530), (140, 146277), (180, 113771), (210, 97518), (252, 81265), (315, 65012), (420, 48759), (630, 32506), (1260, 16253)]