21816560

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{463}}^1$

素因数の和:526

約数の個数: 80

約数和(自身を含む): 55234560

約数和(自身を除く): 33418000

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 31, 38, 40, 62, 76, 80, 95, 124, 152, 155, 190, 248, 304, 310, 380, 463, 496, 589, 620, 760, 926, 1178, 1240, 1520, 1852, 2315, 2356, 2480, 2945, 3704, 4630, 4712, 5890, 7408, 8797, 9260, 9424, 11780, 14353, 17594, 18520, 23560, 28706, 35188, 37040, 43985, 47120, 57412, 70376, 71765, 87970, 114824, 140752, 143530, 175940, 229648, 272707, 287060, 351880, 545414, 574120, 703760, 1090828, 1148240, 1363535, 2181656, 2727070, 4363312, 5454140, 10908280, 21816560]

約数ペア:

[(1, 21816560), (2, 10908280), (4, 5454140), (5, 4363312), (8, 2727070), (10, 2181656), (16, 1363535), (19, 1148240), (20, 1090828), (31, 703760), (38, 574120), (40, 545414), (62, 351880), (76, 287060), (80, 272707), (95, 229648), (124, 175940), (152, 143530), (155, 140752), (190, 114824), (248, 87970), (304, 71765), (310, 70376), (380, 57412), (463, 47120), (496, 43985), (589, 37040), (620, 35188), (760, 28706), (926, 23560), (1178, 18520), (1240, 17594), (1520, 14353), (1852, 11780), (2315, 9424), (2356, 9260), (2480, 8797), (2945, 7408), (3704, 5890), (4630, 4712)]