31239460

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{127}}^1\times {\mathrm{251}}^1$

素因数の和:401

約数の個数: 72

約数和(自身を含む): 77220864

約数和(自身を除く): 45981404

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 127, 140, 196, 245, 251, 254, 490, 502, 508, 635, 889, 980, 1004, 1255, 1270, 1757, 1778, 2510, 2540, 3514, 3556, 4445, 5020, 6223, 7028, 8785, 8890, 12299, 12446, 17570, 17780, 24598, 24892, 31115, 31877, 35140, 49196, 61495, 62230, 63754, 122990, 124460, 127508, 159385, 223139, 245980, 318770, 446278, 637540, 892556, 1115695, 1561973, 2231390, 3123946, 4462780, 6247892, 7809865, 15619730, 31239460]

約数ペア:

[(1, 31239460), (2, 15619730), (4, 7809865), (5, 6247892), (7, 4462780), (10, 3123946), (14, 2231390), (20, 1561973), (28, 1115695), (35, 892556), (49, 637540), (70, 446278), (98, 318770), (127, 245980), (140, 223139), (196, 159385), (245, 127508), (251, 124460), (254, 122990), (490, 63754), (502, 62230), (508, 61495), (635, 49196), (889, 35140), (980, 31877), (1004, 31115), (1255, 24892), (1270, 24598), (1757, 17780), (1778, 17570), (2510, 12446), (2540, 12299), (3514, 8890), (3556, 8785), (4445, 7028), (5020, 6223)]