21470240

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1109}}^1$

素因数の和:1146

約数の個数: 72

約数和(自身を含む): 55804140

約数和(自身を除く): 34333900

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 121, 160, 176, 220, 242, 352, 440, 484, 605, 880, 968, 1109, 1210, 1760, 1936, 2218, 2420, 3872, 4436, 4840, 5545, 8872, 9680, 11090, 12199, 17744, 19360, 22180, 24398, 35488, 44360, 48796, 60995, 88720, 97592, 121990, 134189, 177440, 195184, 243980, 268378, 390368, 487960, 536756, 670945, 975920, 1073512, 1341890, 1951840, 2147024, 2683780, 4294048, 5367560, 10735120, 21470240]

約数ペア:

[(1, 21470240), (2, 10735120), (4, 5367560), (5, 4294048), (8, 2683780), (10, 2147024), (11, 1951840), (16, 1341890), (20, 1073512), (22, 975920), (32, 670945), (40, 536756), (44, 487960), (55, 390368), (80, 268378), (88, 243980), (110, 195184), (121, 177440), (160, 134189), (176, 121990), (220, 97592), (242, 88720), (352, 60995), (440, 48796), (484, 44360), (605, 35488), (880, 24398), (968, 22180), (1109, 19360), (1210, 17744), (1760, 12199), (1936, 11090), (2218, 9680), (2420, 8872), (3872, 5545), (4436, 4840)]