20001200

素因数分解:

$2^4\times 5^2\times {\mathrm{31}}^1\times {\mathrm{1613}}^1$

素因数の和:1662

約数の個数: 60

約数和(自身を含む): 49633728

約数和(自身を除く): 29632528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 40, 50, 62, 80, 100, 124, 155, 200, 248, 310, 400, 496, 620, 775, 1240, 1550, 1613, 2480, 3100, 3226, 6200, 6452, 8065, 12400, 12904, 16130, 25808, 32260, 40325, 50003, 64520, 80650, 100006, 129040, 161300, 200012, 250015, 322600, 400024, 500030, 645200, 800048, 1000060, 1250075, 2000120, 2500150, 4000240, 5000300, 10000600, 20001200]

約数ペア:

[(1, 20001200), (2, 10000600), (4, 5000300), (5, 4000240), (8, 2500150), (10, 2000120), (16, 1250075), (20, 1000060), (25, 800048), (31, 645200), (40, 500030), (50, 400024), (62, 322600), (80, 250015), (100, 200012), (124, 161300), (155, 129040), (200, 100006), (248, 80650), (310, 64520), (400, 50003), (496, 40325), (620, 32260), (775, 25808), (1240, 16130), (1550, 12904), (1613, 12400), (2480, 8065), (3100, 6452), (3226, 6200)]