161720780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{1723}}^1$

素因数の和:1783

約数の個数: 72

約数和(自身を含む): 386224272

約数和(自身を除く): 224503492

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 361, 380, 494, 722, 988, 1235, 1444, 1723, 1805, 2470, 3446, 3610, 4693, 4940, 6892, 7220, 8615, 9386, 17230, 18772, 22399, 23465, 32737, 34460, 44798, 46930, 65474, 89596, 93860, 111995, 130948, 163685, 223990, 327370, 425581, 447980, 622003, 654740, 851162, 1244006, 1702324, 2127905, 2488012, 3110015, 4255810, 6220030, 8086039, 8511620, 12440060, 16172078, 32344156, 40430195, 80860390, 161720780]

約数ペア:

[(1, 161720780), (2, 80860390), (4, 40430195), (5, 32344156), (10, 16172078), (13, 12440060), (19, 8511620), (20, 8086039), (26, 6220030), (38, 4255810), (52, 3110015), (65, 2488012), (76, 2127905), (95, 1702324), (130, 1244006), (190, 851162), (247, 654740), (260, 622003), (361, 447980), (380, 425581), (494, 327370), (722, 223990), (988, 163685), (1235, 130948), (1444, 111995), (1723, 93860), (1805, 89596), (2470, 65474), (3446, 46930), (3610, 44798), (4693, 34460), (4940, 32737), (6892, 23465), (7220, 22399), (8615, 18772), (9386, 17230)]