21453240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:197

約数の個数: 128

約数和(自身を含む): 68198400

約数和(自身を除く): 46745160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 31, 40, 60, 62, 73, 79, 93, 120, 124, 146, 155, 158, 186, 219, 237, 248, 292, 310, 316, 365, 372, 395, 438, 465, 474, 584, 620, 632, 730, 744, 790, 876, 930, 948, 1095, 1185, 1240, 1460, 1580, 1752, 1860, 1896, 2190, 2263, 2370, 2449, 2920, 3160, 3720, 4380, 4526, 4740, 4898, 5767, 6789, 7347, 8760, 9052, 9480, 9796, 11315, 11534, 12245, 13578, 14694, 17301, 18104, 19592, 22630, 23068, 24490, 27156, 28835, 29388, 33945, 34602, 36735, 45260, 46136, 48980, 54312, 57670, 58776, 67890, 69204, 73470, 86505, 90520, 97960, 115340, 135780, 138408, 146940, 173010, 178777, 230680, 271560, 293880, 346020, 357554, 536331, 692040, 715108, 893885, 1072662, 1430216, 1787770, 2145324, 2681655, 3575540, 4290648, 5363310, 7151080, 10726620, 21453240]

約数ペア:

[(1, 21453240), (2, 10726620), (3, 7151080), (4, 5363310), (5, 4290648), (6, 3575540), (8, 2681655), (10, 2145324), (12, 1787770), (15, 1430216), (20, 1072662), (24, 893885), (30, 715108), (31, 692040), (40, 536331), (60, 357554), (62, 346020), (73, 293880), (79, 271560), (93, 230680), (120, 178777), (124, 173010), (146, 146940), (155, 138408), (158, 135780), (186, 115340), (219, 97960), (237, 90520), (248, 86505), (292, 73470), (310, 69204), (316, 67890), (365, 58776), (372, 57670), (395, 54312), (438, 48980), (465, 46136), (474, 45260), (584, 36735), (620, 34602), (632, 33945), (730, 29388), (744, 28835), (790, 27156), (876, 24490), (930, 23068), (948, 22630), (1095, 19592), (1185, 18104), (1240, 17301), (1460, 14694), (1580, 13578), (1752, 12245), (1860, 11534), (1896, 11315), (2190, 9796), (2263, 9480), (2370, 9052), (2449, 8760), (2920, 7347), (3160, 6789), (3720, 5767), (4380, 4898), (4526, 4740)]