About the Number

31188820

31188819 ← → 31188821

2進数表記:1110110111110011101010100

漢数字表記:三千百十八万八千八百二十

素因数分解:

2 2 × 5 1 × 13 1 × 139 1 × 863 1

素因数の和:1024
約数の個数: 48
約数和(自身を含む): 71124480
約数和(自身を除く): 39935660

約数列:
[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 139, 260, 278, 556, 695, 863, 1390, 1726, 1807, 2780, 3452, 3614, 4315, 7228, 8630, 9035, 11219, 17260, 18070, 22438, 36140, 44876, 56095, 112190, 119957, 224380, 239914, 479828, 599785, 1199570, 1559441, 2399140, 3118882, 6237764, 7797205, 15594410, 31188820]

約数ペア:
[(1, 31188820), (2, 15594410), (4, 7797205), (5, 6237764), (10, 3118882), (13, 2399140), (20, 1559441), (26, 1199570), (52, 599785), (65, 479828), (130, 239914), (139, 224380), (260, 119957), (278, 112190), (556, 56095), (695, 44876), (863, 36140), (1390, 22438), (1726, 18070), (1807, 17260), (2780, 11219), (3452, 9035), (3614, 8630), (4315, 7228)]

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