21640240

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{619}}^1$

素因数の和:674

約数の個数: 80

約数和(自身を含む): 55353600

約数和(自身を除く): 33713360

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 23, 38, 40, 46, 76, 80, 92, 95, 115, 152, 184, 190, 230, 304, 368, 380, 437, 460, 619, 760, 874, 920, 1238, 1520, 1748, 1840, 2185, 2476, 3095, 3496, 4370, 4952, 6190, 6992, 8740, 9904, 11761, 12380, 14237, 17480, 23522, 24760, 28474, 34960, 47044, 49520, 56948, 58805, 71185, 94088, 113896, 117610, 142370, 188176, 227792, 235220, 270503, 284740, 470440, 541006, 569480, 940880, 1082012, 1138960, 1352515, 2164024, 2705030, 4328048, 5410060, 10820120, 21640240]

約数ペア:

[(1, 21640240), (2, 10820120), (4, 5410060), (5, 4328048), (8, 2705030), (10, 2164024), (16, 1352515), (19, 1138960), (20, 1082012), (23, 940880), (38, 569480), (40, 541006), (46, 470440), (76, 284740), (80, 270503), (92, 235220), (95, 227792), (115, 188176), (152, 142370), (184, 117610), (190, 113896), (230, 94088), (304, 71185), (368, 58805), (380, 56948), (437, 49520), (460, 47044), (619, 34960), (760, 28474), (874, 24760), (920, 23522), (1238, 17480), (1520, 14237), (1748, 12380), (1840, 11761), (2185, 9904), (2476, 8740), (3095, 6992), (3496, 6190), (4370, 4952)]