81368420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{1051}}^1$

素因数の和:1153

約数の個数: 72

約数和(自身を含む): 201479040

約数和(自身を除く): 120110620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 79, 98, 140, 158, 196, 245, 316, 395, 490, 553, 790, 980, 1051, 1106, 1580, 2102, 2212, 2765, 3871, 4204, 5255, 5530, 7357, 7742, 10510, 11060, 14714, 15484, 19355, 21020, 29428, 36785, 38710, 51499, 73570, 77420, 83029, 102998, 147140, 166058, 205996, 257495, 332116, 415145, 514990, 581203, 830290, 1029980, 1162406, 1660580, 2324812, 2906015, 4068421, 5812030, 8136842, 11624060, 16273684, 20342105, 40684210, 81368420]

約数ペア:

[(1, 81368420), (2, 40684210), (4, 20342105), (5, 16273684), (7, 11624060), (10, 8136842), (14, 5812030), (20, 4068421), (28, 2906015), (35, 2324812), (49, 1660580), (70, 1162406), (79, 1029980), (98, 830290), (140, 581203), (158, 514990), (196, 415145), (245, 332116), (316, 257495), (395, 205996), (490, 166058), (553, 147140), (790, 102998), (980, 83029), (1051, 77420), (1106, 73570), (1580, 51499), (2102, 38710), (2212, 36785), (2765, 29428), (3871, 21020), (4204, 19355), (5255, 15484), (5530, 14714), (7357, 11060), (7742, 10510)]