31800020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{877}}^1$

素因数の和:937

約数の個数: 72

約数和(自身を含む): 79873416

約数和(自身を除く): 48073396

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 74, 98, 140, 148, 185, 196, 245, 259, 370, 490, 518, 740, 877, 980, 1036, 1295, 1754, 1813, 2590, 3508, 3626, 4385, 5180, 6139, 7252, 8770, 9065, 12278, 17540, 18130, 24556, 30695, 32449, 36260, 42973, 61390, 64898, 85946, 122780, 129796, 162245, 171892, 214865, 227143, 324490, 429730, 454286, 648980, 859460, 908572, 1135715, 1590001, 2271430, 3180002, 4542860, 6360004, 7950005, 15900010, 31800020]

約数ペア:

[(1, 31800020), (2, 15900010), (4, 7950005), (5, 6360004), (7, 4542860), (10, 3180002), (14, 2271430), (20, 1590001), (28, 1135715), (35, 908572), (37, 859460), (49, 648980), (70, 454286), (74, 429730), (98, 324490), (140, 227143), (148, 214865), (185, 171892), (196, 162245), (245, 129796), (259, 122780), (370, 85946), (490, 64898), (518, 61390), (740, 42973), (877, 36260), (980, 32449), (1036, 30695), (1295, 24556), (1754, 18130), (1813, 17540), (2590, 12278), (3508, 9065), (3626, 8770), (4385, 7252), (5180, 6139)]