640890180

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{508643}}^1$

素因数の和:508665

約数の個数: 72

約数和(自身を含む): 2221756992

約数和(自身を除く): 1580866812

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, 508643, 1017286, 1525929, 2034572, 2543215, 3051858, 3560501, 4577787, 5086430, 6103716, 7121002, 7629645, 9155574, 10172860, 10681503, 14242004, 15259290, 17802505, 18311148, 21363006, 22888935, 30518580, 32044509, 35605010, 42726012, 45777870, 53407515, 64089018, 71210020, 91555740, 106815030, 128178036, 160222545, 213630060, 320445090, 640890180]

約数ペア:

[(1, 640890180), (2, 320445090), (3, 213630060), (4, 160222545), (5, 128178036), (6, 106815030), (7, 91555740), (9, 71210020), (10, 64089018), (12, 53407515), (14, 45777870), (15, 42726012), (18, 35605010), (20, 32044509), (21, 30518580), (28, 22888935), (30, 21363006), (35, 18311148), (36, 17802505), (42, 15259290), (45, 14242004), (60, 10681503), (63, 10172860), (70, 9155574), (84, 7629645), (90, 7121002), (105, 6103716), (126, 5086430), (140, 4577787), (180, 3560501), (210, 3051858), (252, 2543215), (315, 2034572), (420, 1525929), (630, 1017286), (1260, 508643)]