21393820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:223

約数の個数: 96

約数和(自身を含む): 55520640

約数和(自身を除く): 34126820

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 89, 101, 119, 140, 170, 178, 202, 238, 340, 356, 404, 445, 476, 505, 595, 623, 707, 890, 1010, 1190, 1246, 1414, 1513, 1717, 1780, 2020, 2380, 2492, 2828, 3026, 3115, 3434, 3535, 6052, 6230, 6868, 7070, 7565, 8585, 8989, 10591, 12019, 12460, 14140, 15130, 17170, 17978, 21182, 24038, 30260, 34340, 35956, 42364, 44945, 48076, 52955, 60095, 62923, 89890, 105910, 120190, 125846, 152813, 179780, 211820, 240380, 251692, 305626, 314615, 611252, 629230, 764065, 1069691, 1258460, 1528130, 2139382, 3056260, 4278764, 5348455, 10696910, 21393820]

約数ペア:

[(1, 21393820), (2, 10696910), (4, 5348455), (5, 4278764), (7, 3056260), (10, 2139382), (14, 1528130), (17, 1258460), (20, 1069691), (28, 764065), (34, 629230), (35, 611252), (68, 314615), (70, 305626), (85, 251692), (89, 240380), (101, 211820), (119, 179780), (140, 152813), (170, 125846), (178, 120190), (202, 105910), (238, 89890), (340, 62923), (356, 60095), (404, 52955), (445, 48076), (476, 44945), (505, 42364), (595, 35956), (623, 34340), (707, 30260), (890, 24038), (1010, 21182), (1190, 17978), (1246, 17170), (1414, 15130), (1513, 14140), (1717, 12460), (1780, 12019), (2020, 10591), (2380, 8989), (2492, 8585), (2828, 7565), (3026, 7070), (3115, 6868), (3434, 6230), (3535, 6052)]