21706480

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{251}}^1$

素因数の和:334

約数の個数: 80

約数和(自身を含む): 53996544

約数和(自身を除く): 32290064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 47, 80, 92, 94, 115, 184, 188, 230, 235, 251, 368, 376, 460, 470, 502, 752, 920, 940, 1004, 1081, 1255, 1840, 1880, 2008, 2162, 2510, 3760, 4016, 4324, 5020, 5405, 5773, 8648, 10040, 10810, 11546, 11797, 17296, 20080, 21620, 23092, 23594, 28865, 43240, 46184, 47188, 57730, 58985, 86480, 92368, 94376, 115460, 117970, 188752, 230920, 235940, 271331, 461840, 471880, 542662, 943760, 1085324, 1356655, 2170648, 2713310, 4341296, 5426620, 10853240, 21706480]

約数ペア:

[(1, 21706480), (2, 10853240), (4, 5426620), (5, 4341296), (8, 2713310), (10, 2170648), (16, 1356655), (20, 1085324), (23, 943760), (40, 542662), (46, 471880), (47, 461840), (80, 271331), (92, 235940), (94, 230920), (115, 188752), (184, 117970), (188, 115460), (230, 94376), (235, 92368), (251, 86480), (368, 58985), (376, 57730), (460, 47188), (470, 46184), (502, 43240), (752, 28865), (920, 23594), (940, 23092), (1004, 21620), (1081, 20080), (1255, 17296), (1840, 11797), (1880, 11546), (2008, 10810), (2162, 10040), (2510, 8648), (3760, 5773), (4016, 5405), (4324, 5020)]