About the Number

121210020

121210019 ← → 121210021

2進数表記:111001110011000010010100100

漢数字表記:一億二千百二十一万二十

素因数分解:

2 2 × 3 4 × 5 1 × 74821 1

素因数の和:74842
約数の個数: 60
約数和(自身を含む): 380245404
約数和(自身を除く): 259035384

約数列:
[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 270, 324, 405, 540, 810, 1620, 74821, 149642, 224463, 299284, 374105, 448926, 673389, 748210, 897852, 1122315, 1346778, 1496420, 2020167, 2244630, 2693556, 3366945, 4040334, 4489260, 6060501, 6733890, 8080668, 10100835, 12121002, 13467780, 20201670, 24242004, 30302505, 40403340, 60605010, 121210020]

約数ペア:
[(1, 121210020), (2, 60605010), (3, 40403340), (4, 30302505), (5, 24242004), (6, 20201670), (9, 13467780), (10, 12121002), (12, 10100835), (15, 8080668), (18, 6733890), (20, 6060501), (27, 4489260), (30, 4040334), (36, 3366945), (45, 2693556), (54, 2244630), (60, 2020167), (81, 1496420), (90, 1346778), (108, 1122315), (135, 897852), (162, 748210), (180, 673389), (270, 448926), (324, 374105), (405, 299284), (540, 224463), (810, 149642), (1620, 74821)]

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