20894940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:260

約数の個数: 144

約数和(自身を含む): 70682976

約数和(自身を除く): 49788036

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 61, 66, 90, 99, 110, 122, 132, 165, 173, 180, 183, 198, 220, 244, 305, 330, 346, 366, 396, 495, 519, 549, 610, 660, 671, 692, 732, 865, 915, 990, 1038, 1098, 1220, 1342, 1557, 1730, 1830, 1903, 1980, 2013, 2076, 2196, 2595, 2684, 2745, 3114, 3355, 3460, 3660, 3806, 4026, 5190, 5490, 5709, 6039, 6228, 6710, 7612, 7785, 8052, 9515, 10065, 10380, 10553, 10980, 11418, 12078, 13420, 15570, 17127, 19030, 20130, 21106, 22836, 24156, 28545, 30195, 31140, 31659, 34254, 38060, 40260, 42212, 52765, 57090, 60390, 63318, 68508, 85635, 94977, 105530, 114180, 116083, 120780, 126636, 158295, 171270, 189954, 211060, 232166, 316590, 342540, 348249, 379908, 464332, 474885, 580415, 633180, 696498, 949770, 1044747, 1160830, 1392996, 1741245, 1899540, 2089494, 2321660, 3482490, 4178988, 5223735, 6964980, 10447470, 20894940]

約数ペア:

[(1, 20894940), (2, 10447470), (3, 6964980), (4, 5223735), (5, 4178988), (6, 3482490), (9, 2321660), (10, 2089494), (11, 1899540), (12, 1741245), (15, 1392996), (18, 1160830), (20, 1044747), (22, 949770), (30, 696498), (33, 633180), (36, 580415), (44, 474885), (45, 464332), (55, 379908), (60, 348249), (61, 342540), (66, 316590), (90, 232166), (99, 211060), (110, 189954), (122, 171270), (132, 158295), (165, 126636), (173, 120780), (180, 116083), (183, 114180), (198, 105530), (220, 94977), (244, 85635), (305, 68508), (330, 63318), (346, 60390), (366, 57090), (396, 52765), (495, 42212), (519, 40260), (549, 38060), (610, 34254), (660, 31659), (671, 31140), (692, 30195), (732, 28545), (865, 24156), (915, 22836), (990, 21106), (1038, 20130), (1098, 19030), (1220, 17127), (1342, 15570), (1557, 13420), (1730, 12078), (1830, 11418), (1903, 10980), (1980, 10553), (2013, 10380), (2076, 10065), (2196, 9515), (2595, 8052), (2684, 7785), (2745, 7612), (3114, 6710), (3355, 6228), (3460, 6039), (3660, 5709), (3806, 5490), (4026, 5190)]