21450880

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^2\times {\mathrm{277}}^1$

素因数の和:318

約数の個数: 96

約数和(自身を含む): 56570220

約数和(自身を除く): 35119340

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 121, 128, 160, 176, 220, 242, 277, 320, 352, 440, 484, 554, 605, 640, 704, 880, 968, 1108, 1210, 1385, 1408, 1760, 1936, 2216, 2420, 2770, 3047, 3520, 3872, 4432, 4840, 5540, 6094, 7040, 7744, 8864, 9680, 11080, 12188, 15235, 15488, 17728, 19360, 22160, 24376, 30470, 33517, 35456, 38720, 44320, 48752, 60940, 67034, 77440, 88640, 97504, 121880, 134068, 167585, 177280, 195008, 243760, 268136, 335170, 390016, 487520, 536272, 670340, 975040, 1072544, 1340680, 1950080, 2145088, 2681360, 4290176, 5362720, 10725440, 21450880]

約数ペア:

[(1, 21450880), (2, 10725440), (4, 5362720), (5, 4290176), (8, 2681360), (10, 2145088), (11, 1950080), (16, 1340680), (20, 1072544), (22, 975040), (32, 670340), (40, 536272), (44, 487520), (55, 390016), (64, 335170), (80, 268136), (88, 243760), (110, 195008), (121, 177280), (128, 167585), (160, 134068), (176, 121880), (220, 97504), (242, 88640), (277, 77440), (320, 67034), (352, 60940), (440, 48752), (484, 44320), (554, 38720), (605, 35456), (640, 33517), (704, 30470), (880, 24376), (968, 22160), (1108, 19360), (1210, 17728), (1385, 15488), (1408, 15235), (1760, 12188), (1936, 11080), (2216, 9680), (2420, 8864), (2770, 7744), (3047, 7040), (3520, 6094), (3872, 5540), (4432, 4840)]