19968525

素因数分解:

$3^5\times 5^2\times {\mathrm{19}}^1\times {\mathrm{173}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 39268320

約数和(自身を除く): 19299795

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 81, 95, 135, 171, 173, 225, 243, 285, 405, 475, 513, 519, 675, 855, 865, 1215, 1425, 1539, 1557, 2025, 2565, 2595, 3287, 4275, 4325, 4617, 4671, 6075, 7695, 7785, 9861, 12825, 12975, 14013, 16435, 23085, 23355, 29583, 38475, 38925, 42039, 49305, 70065, 82175, 88749, 115425, 116775, 147915, 210195, 246525, 266247, 350325, 443745, 739575, 798741, 1050975, 1331235, 2218725, 3993705, 6656175, 19968525]

約数ペア:

[(1, 19968525), (3, 6656175), (5, 3993705), (9, 2218725), (15, 1331235), (19, 1050975), (25, 798741), (27, 739575), (45, 443745), (57, 350325), (75, 266247), (81, 246525), (95, 210195), (135, 147915), (171, 116775), (173, 115425), (225, 88749), (243, 82175), (285, 70065), (405, 49305), (475, 42039), (513, 38925), (519, 38475), (675, 29583), (855, 23355), (865, 23085), (1215, 16435), (1425, 14013), (1539, 12975), (1557, 12825), (2025, 9861), (2565, 7785), (2595, 7695), (3287, 6075), (4275, 4671), (4325, 4617)]