21965020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{839}}^1$

素因数の和:883

約数の個数: 96

約数和(自身を含む): 60963840

約数和(自身を除く): 38998820

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 17, 20, 22, 28, 34, 35, 44, 55, 68, 70, 77, 85, 110, 119, 140, 154, 170, 187, 220, 238, 308, 340, 374, 385, 476, 595, 748, 770, 839, 935, 1190, 1309, 1540, 1678, 1870, 2380, 2618, 3356, 3740, 4195, 5236, 5873, 6545, 8390, 9229, 11746, 13090, 14263, 16780, 18458, 23492, 26180, 28526, 29365, 36916, 46145, 57052, 58730, 64603, 71315, 92290, 99841, 117460, 129206, 142630, 156893, 184580, 199682, 258412, 285260, 313786, 323015, 399364, 499205, 627572, 646030, 784465, 998410, 1098251, 1292060, 1568930, 1996820, 2196502, 3137860, 4393004, 5491255, 10982510, 21965020]

約数ペア:

[(1, 21965020), (2, 10982510), (4, 5491255), (5, 4393004), (7, 3137860), (10, 2196502), (11, 1996820), (14, 1568930), (17, 1292060), (20, 1098251), (22, 998410), (28, 784465), (34, 646030), (35, 627572), (44, 499205), (55, 399364), (68, 323015), (70, 313786), (77, 285260), (85, 258412), (110, 199682), (119, 184580), (140, 156893), (154, 142630), (170, 129206), (187, 117460), (220, 99841), (238, 92290), (308, 71315), (340, 64603), (374, 58730), (385, 57052), (476, 46145), (595, 36916), (748, 29365), (770, 28526), (839, 26180), (935, 23492), (1190, 18458), (1309, 16780), (1540, 14263), (1678, 13090), (1870, 11746), (2380, 9229), (2618, 8390), (3356, 6545), (3740, 5873), (4195, 5236)]