21866740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{421}}^1$

素因数の和:497

約数の個数: 72

約数和(自身を含む): 54554472

約数和(自身を除く): 32687732

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 53, 70, 98, 106, 140, 196, 212, 245, 265, 371, 421, 490, 530, 742, 842, 980, 1060, 1484, 1684, 1855, 2105, 2597, 2947, 3710, 4210, 5194, 5894, 7420, 8420, 10388, 11788, 12985, 14735, 20629, 22313, 25970, 29470, 41258, 44626, 51940, 58940, 82516, 89252, 103145, 111565, 156191, 206290, 223130, 312382, 412580, 446260, 624764, 780955, 1093337, 1561910, 2186674, 3123820, 4373348, 5466685, 10933370, 21866740]

約数ペア:

[(1, 21866740), (2, 10933370), (4, 5466685), (5, 4373348), (7, 3123820), (10, 2186674), (14, 1561910), (20, 1093337), (28, 780955), (35, 624764), (49, 446260), (53, 412580), (70, 312382), (98, 223130), (106, 206290), (140, 156191), (196, 111565), (212, 103145), (245, 89252), (265, 82516), (371, 58940), (421, 51940), (490, 44626), (530, 41258), (742, 29470), (842, 25970), (980, 22313), (1060, 20629), (1484, 14735), (1684, 12985), (1855, 11788), (2105, 10388), (2597, 8420), (2947, 7420), (3710, 5894), (4210, 5194)]