21790340

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{401}}^1$

素因数の和:453

約数の個数: 96

約数和(自身を含む): 56730240

約数和(自身を除く): 34939900

約数列:

[1, 2, 4, 5, 10, 11, 13, 19, 20, 22, 26, 38, 44, 52, 55, 65, 76, 95, 110, 130, 143, 190, 209, 220, 247, 260, 286, 380, 401, 418, 494, 572, 715, 802, 836, 988, 1045, 1235, 1430, 1604, 2005, 2090, 2470, 2717, 2860, 4010, 4180, 4411, 4940, 5213, 5434, 7619, 8020, 8822, 10426, 10868, 13585, 15238, 17644, 20852, 22055, 26065, 27170, 30476, 38095, 44110, 52130, 54340, 57343, 76190, 83809, 88220, 99047, 104260, 114686, 152380, 167618, 198094, 229372, 286715, 335236, 396188, 419045, 495235, 573430, 838090, 990470, 1089517, 1146860, 1676180, 1980940, 2179034, 4358068, 5447585, 10895170, 21790340]

約数ペア:

[(1, 21790340), (2, 10895170), (4, 5447585), (5, 4358068), (10, 2179034), (11, 1980940), (13, 1676180), (19, 1146860), (20, 1089517), (22, 990470), (26, 838090), (38, 573430), (44, 495235), (52, 419045), (55, 396188), (65, 335236), (76, 286715), (95, 229372), (110, 198094), (130, 167618), (143, 152380), (190, 114686), (209, 104260), (220, 99047), (247, 88220), (260, 83809), (286, 76190), (380, 57343), (401, 54340), (418, 52130), (494, 44110), (572, 38095), (715, 30476), (802, 27170), (836, 26065), (988, 22055), (1045, 20852), (1235, 17644), (1430, 15238), (1604, 13585), (2005, 10868), (2090, 10426), (2470, 8822), (2717, 8020), (2860, 7619), (4010, 5434), (4180, 5213), (4411, 4940)]