21479900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:112

約数の個数: 108

約数和(自身を含む): 53371584

約数和(自身を除く): 31891684

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 31, 41, 50, 52, 62, 65, 82, 100, 124, 130, 155, 164, 169, 205, 260, 310, 325, 338, 403, 410, 533, 620, 650, 676, 775, 806, 820, 845, 1025, 1066, 1271, 1300, 1550, 1612, 1690, 2015, 2050, 2132, 2542, 2665, 3100, 3380, 4030, 4100, 4225, 5084, 5239, 5330, 6355, 6929, 8060, 8450, 10075, 10478, 10660, 12710, 13325, 13858, 16523, 16900, 20150, 20956, 25420, 26195, 26650, 27716, 31775, 33046, 34645, 40300, 52390, 53300, 63550, 66092, 69290, 82615, 104780, 127100, 130975, 138580, 165230, 173225, 214799, 261950, 330460, 346450, 413075, 429598, 523900, 692900, 826150, 859196, 1073995, 1652300, 2147990, 4295980, 5369975, 10739950, 21479900]

約数ペア:

[(1, 21479900), (2, 10739950), (4, 5369975), (5, 4295980), (10, 2147990), (13, 1652300), (20, 1073995), (25, 859196), (26, 826150), (31, 692900), (41, 523900), (50, 429598), (52, 413075), (62, 346450), (65, 330460), (82, 261950), (100, 214799), (124, 173225), (130, 165230), (155, 138580), (164, 130975), (169, 127100), (205, 104780), (260, 82615), (310, 69290), (325, 66092), (338, 63550), (403, 53300), (410, 52390), (533, 40300), (620, 34645), (650, 33046), (676, 31775), (775, 27716), (806, 26650), (820, 26195), (845, 25420), (1025, 20956), (1066, 20150), (1271, 16900), (1300, 16523), (1550, 13858), (1612, 13325), (1690, 12710), (2015, 10660), (2050, 10478), (2132, 10075), (2542, 8450), (2665, 8060), (3100, 6929), (3380, 6355), (4030, 5330), (4100, 5239), (4225, 5084)]