21391416

素因数分解:

$2^3\times 3^2\times {\mathrm{19}}^2\times {\mathrm{823}}^1$

素因数の和:873

約数の個数: 72

約数和(自身を含む): 61219080

約数和(自身を除く): 39827664

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 19, 24, 36, 38, 57, 72, 76, 114, 152, 171, 228, 342, 361, 456, 684, 722, 823, 1083, 1368, 1444, 1646, 2166, 2469, 2888, 3249, 3292, 4332, 4938, 6498, 6584, 7407, 8664, 9876, 12996, 14814, 15637, 19752, 25992, 29628, 31274, 46911, 59256, 62548, 93822, 125096, 140733, 187644, 281466, 297103, 375288, 562932, 594206, 891309, 1125864, 1188412, 1782618, 2376824, 2673927, 3565236, 5347854, 7130472, 10695708, 21391416]

約数ペア:

[(1, 21391416), (2, 10695708), (3, 7130472), (4, 5347854), (6, 3565236), (8, 2673927), (9, 2376824), (12, 1782618), (18, 1188412), (19, 1125864), (24, 891309), (36, 594206), (38, 562932), (57, 375288), (72, 297103), (76, 281466), (114, 187644), (152, 140733), (171, 125096), (228, 93822), (342, 62548), (361, 59256), (456, 46911), (684, 31274), (722, 29628), (823, 25992), (1083, 19752), (1368, 15637), (1444, 14814), (1646, 12996), (2166, 9876), (2469, 8664), (2888, 7407), (3249, 6584), (3292, 6498), (4332, 4938)]