21635380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{173}}^1$

素因数の和:245

約数の個数: 72

約数和(自身を含む): 50819832

約数和(自身を除く): 29184452

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 74, 130, 148, 169, 173, 185, 260, 338, 346, 370, 481, 676, 692, 740, 845, 865, 962, 1690, 1730, 1924, 2249, 2405, 3380, 3460, 4498, 4810, 6253, 6401, 8996, 9620, 11245, 12506, 12802, 22490, 25012, 25604, 29237, 31265, 32005, 44980, 58474, 62530, 64010, 83213, 116948, 125060, 128020, 146185, 166426, 292370, 332852, 416065, 584740, 832130, 1081769, 1664260, 2163538, 4327076, 5408845, 10817690, 21635380]

約数ペア:

[(1, 21635380), (2, 10817690), (4, 5408845), (5, 4327076), (10, 2163538), (13, 1664260), (20, 1081769), (26, 832130), (37, 584740), (52, 416065), (65, 332852), (74, 292370), (130, 166426), (148, 146185), (169, 128020), (173, 125060), (185, 116948), (260, 83213), (338, 64010), (346, 62530), (370, 58474), (481, 44980), (676, 32005), (692, 31265), (740, 29237), (845, 25604), (865, 25012), (962, 22490), (1690, 12802), (1730, 12506), (1924, 11245), (2249, 9620), (2405, 8996), (3380, 6401), (3460, 6253), (4498, 4810)]