20761760

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^2\times {\mathrm{449}}^1$

素因数の和:498

約数の個数: 72

約数和(自身を含む): 52220700

約数和(自身を除く): 31458940

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 289, 340, 449, 544, 578, 680, 898, 1156, 1360, 1445, 1796, 2245, 2312, 2720, 2890, 3592, 4490, 4624, 5780, 7184, 7633, 8980, 9248, 11560, 14368, 15266, 17960, 23120, 30532, 35920, 38165, 46240, 61064, 71840, 76330, 122128, 129761, 152660, 244256, 259522, 305320, 519044, 610640, 648805, 1038088, 1221280, 1297610, 2076176, 2595220, 4152352, 5190440, 10380880, 20761760]

約数ペア:

[(1, 20761760), (2, 10380880), (4, 5190440), (5, 4152352), (8, 2595220), (10, 2076176), (16, 1297610), (17, 1221280), (20, 1038088), (32, 648805), (34, 610640), (40, 519044), (68, 305320), (80, 259522), (85, 244256), (136, 152660), (160, 129761), (170, 122128), (272, 76330), (289, 71840), (340, 61064), (449, 46240), (544, 38165), (578, 35920), (680, 30532), (898, 23120), (1156, 17960), (1360, 15266), (1445, 14368), (1796, 11560), (2245, 9248), (2312, 8980), (2720, 7633), (2890, 7184), (3592, 5780), (4490, 4624)]