81842480

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{541}}^1$

素因数の和:646

約数の個数: 80

約数和(自身を含む): 200011008

約数和(自身を除く): 118168528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 61, 62, 80, 122, 124, 155, 244, 248, 305, 310, 488, 496, 541, 610, 620, 976, 1082, 1220, 1240, 1891, 2164, 2440, 2480, 2705, 3782, 4328, 4880, 5410, 7564, 8656, 9455, 10820, 15128, 16771, 18910, 21640, 30256, 33001, 33542, 37820, 43280, 66002, 67084, 75640, 83855, 132004, 134168, 151280, 165005, 167710, 264008, 268336, 330010, 335420, 528016, 660020, 670840, 1023031, 1320040, 1341680, 2046062, 2640080, 4092124, 5115155, 8184248, 10230310, 16368496, 20460620, 40921240, 81842480]

約数ペア:

[(1, 81842480), (2, 40921240), (4, 20460620), (5, 16368496), (8, 10230310), (10, 8184248), (16, 5115155), (20, 4092124), (31, 2640080), (40, 2046062), (61, 1341680), (62, 1320040), (80, 1023031), (122, 670840), (124, 660020), (155, 528016), (244, 335420), (248, 330010), (305, 268336), (310, 264008), (488, 167710), (496, 165005), (541, 151280), (610, 134168), (620, 132004), (976, 83855), (1082, 75640), (1220, 67084), (1240, 66002), (1891, 43280), (2164, 37820), (2440, 33542), (2480, 33001), (2705, 30256), (3782, 21640), (4328, 18910), (4880, 16771), (5410, 15128), (7564, 10820), (8656, 9455)]