21664940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:183

約数の個数: 96

約数和(自身を含む): 53706240

約数和(自身を除く): 32041300

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 71, 73, 76, 95, 110, 142, 146, 190, 209, 220, 284, 292, 355, 365, 380, 418, 710, 730, 781, 803, 836, 1045, 1349, 1387, 1420, 1460, 1562, 1606, 2090, 2698, 2774, 3124, 3212, 3905, 4015, 4180, 5183, 5396, 5548, 6745, 6935, 7810, 8030, 10366, 13490, 13870, 14839, 15257, 15620, 16060, 20732, 25915, 26980, 27740, 29678, 30514, 51830, 57013, 59356, 61028, 74195, 76285, 98477, 103660, 114026, 148390, 152570, 196954, 228052, 285065, 296780, 305140, 393908, 492385, 570130, 984770, 1083247, 1140260, 1969540, 2166494, 4332988, 5416235, 10832470, 21664940]

約数ペア:

[(1, 21664940), (2, 10832470), (4, 5416235), (5, 4332988), (10, 2166494), (11, 1969540), (19, 1140260), (20, 1083247), (22, 984770), (38, 570130), (44, 492385), (55, 393908), (71, 305140), (73, 296780), (76, 285065), (95, 228052), (110, 196954), (142, 152570), (146, 148390), (190, 114026), (209, 103660), (220, 98477), (284, 76285), (292, 74195), (355, 61028), (365, 59356), (380, 57013), (418, 51830), (710, 30514), (730, 29678), (781, 27740), (803, 26980), (836, 25915), (1045, 20732), (1349, 16060), (1387, 15620), (1420, 15257), (1460, 14839), (1562, 13870), (1606, 13490), (2090, 10366), (2698, 8030), (2774, 7810), (3124, 6935), (3212, 6745), (3905, 5548), (4015, 5396), (4180, 5183)]