81014720

素因数分解:

$2^6\times 5^1\times {\mathrm{409}}^1\times {\mathrm{619}}^1$

素因数の和:1045

約数の個数: 56

約数和(自身を含む): 193700400

約数和(自身を除く): 112685680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 409, 619, 818, 1238, 1636, 2045, 2476, 3095, 3272, 4090, 4952, 6190, 6544, 8180, 9904, 12380, 13088, 16360, 19808, 24760, 26176, 32720, 39616, 49520, 65440, 99040, 130880, 198080, 253171, 506342, 1012684, 1265855, 2025368, 2531710, 4050736, 5063420, 8101472, 10126840, 16202944, 20253680, 40507360, 81014720]

約数ペア:

[(1, 81014720), (2, 40507360), (4, 20253680), (5, 16202944), (8, 10126840), (10, 8101472), (16, 5063420), (20, 4050736), (32, 2531710), (40, 2025368), (64, 1265855), (80, 1012684), (160, 506342), (320, 253171), (409, 198080), (619, 130880), (818, 99040), (1238, 65440), (1636, 49520), (2045, 39616), (2476, 32720), (3095, 26176), (3272, 24760), (4090, 19808), (4952, 16360), (6190, 13088), (6544, 12380), (8180, 9904)]